I'm not vegan but I have been vegetarian for a long while. The main thing that makes being vegetarian/vegan so hard with this fetish is that most of that food just doesn't have that many calories so you have to find little work arounds and just eat in as large of quantities as you can stomach. I would suggest trying to find a good protein powder/mass gainer (I don't know any vegan brands off the top of my head) and make a bunch of weight gain shakes with that and peanut butter (I've found I prefer soy milk for shakes if I do a milk alternative but really any of them should work). Then for meals just try to find things that are heavy in carbs and try to eat as much as you can. For a nice simple meal one of my favorites is refried beans on rice with cornbread.

This is my my feederism hot take but honestly I don't like completely sedentary jobs as a feedee because at least for me if I stay sedentary all day I just don't get an appetite at all. I would say preferably try to find a job where you move around some but still get to sit down for long parts of the day. I currently work at a warehouse as a wheel chair technician which allows me to set around for most of the day waiting for our deliveries to show up, and when they do I can sit down while I work on them. Because of that I'm burning some calories through out the day but it makes me hungry enough I'm easily able to eat enough to replace and exceed the calories lost.

I'd say if you're in the fence give it a shot. I thought I was more of a feeder/fat admirer when I first got into this fetish but I started gaining weight on my own and I turned into a full on feedee. If you gain a few lbs and decide it's not for you, then no harm no foul. Its not that hard to loose that little of weight. But if you decide you like it then you may actually be a feedee in hiding or a mutual gainer

I've mentioned this on other posts but I started gaining when I was 125 lbs, but it was a lot of lean muscle mass. Once I hit 175 ish I started putting on some more body fat as well as muscle, and now I'm sitting at 222 looking to get bigger

That's sick, do you have a weight goal in mind or are you just gaining as much as you physically can?

I technically started gaining weight my freshman year of high school which was right when the pandemic hit. At that point I was aware of this community but always thought of myself more as the feeder so I wasn't interested in getting fat myself so all the weight I gained was just lean muscle mass which took me up from 126 lbs my freshman year to 175 lbs my junior year.
It was then I started getting dissatisfied with my body. I had literally gained 50 lbs but you could still see my ribs which bothered the hell out of me. I then started watching videos about famous strongman like Eddie Hall and Brian Shaw and decided I wanted a body type closer to that with muscles and belly fat. So around midway through my junior year I just stopped dieting and I've managed to put on a fair bit of fluff since then.
But now after I have some fat I've grown obsessed with it and I want a lot more, I was more of less passively gaining before I wasn't really counting my calories I was just generally trying to eat more food. Now I've decided to take the next step and actively start stuffing myself more

I'm at that exact point too. Im still not entirely comfortable in public with my belly (I'm hoping that'll go away as I get bigger) so I still suck it in when I'm outside but in the last month it's been a lot harder to do that and a bit of it still pokes out now. I'm almost giddy at the idea of sometime soon trying to suck it in but it hardly makes a difference

That's why I like to advocate for male feedees/gainers to also lift weights while gaining. I've found that for a lot of guys until you get really big, their legs, ass, and arms tend to not put on as much size as their gut. That's why I like to mix in a decent amount of weight lifting to balance out those areas. I just think it gives guys a more over all rounded/curvy look, and that's what I'm going for with my gain

I wonder if the size of the feedee plays a factor, I'm a switch so my opinion may be biased but I feel more dominant as Im currently more muscular and just a hair over 220, but I could definitely see myself being more submissive as I got bigger and less mobile. I feel like by the time a feedee gets to immobility it would almost be impossible not to be the submissive one as your entire life would be dependent on your feeder. Though those are just my thoughts

I'm very fascinated and completely terrified of one day being immobile. It honestly sounds like it would be hot as hell being surrounded by your own squish all day completely unable to move. But at the same time I feel like I would go insane not being able to go outside and at least walk around. So I feel like I'd love to get the point of having limited mobility but I don't know if I could bring myself to get to the point of full immobility