Welcome from BC, Canada!
Congrats on your transition to veganism and/or a whole foods plant-based diet. It is likely the latter you wish to adapt, if you wish to live to 100.
While a vegan diet can certainly be healthy as well, it opens the door for other not so healthy foods. After all, most beers are vegan, as are Oreo cookies. So you get my point. The lifestyle that helps you live longer is still vegan, but consists of whole foods that are entirely plant-based. So nothing processed, including oils. In fact, oil is probably the single most harmful processed food. They, as in the mainstream plant-based doctors, suggest no salt, oil, and sugar, with a true WFPB diet for optimum health.
I'd suggest educating yourself on the lifestyle as much as possible. Watch everything you can about WFPB living on YouTube, and Google all your questions too. There's some amazing documentaries I'd suggest as well. They can help educate as well as keep you motivated.
As for the digestive problems, these are extremely common when beginning a WFPB diet. Make sure you rinse your canned beans thoroughly, or better yet, use dry beans, and soak, rinse, and cook them properly. Many of the veggies and legumes you eat will cause slight bloating and gas. You will eventually build a tolerance to them. It will get better.
A few great documentaries to watch are:
Forks Over Knives,
Cowspiracy,
Eating You Alive,
What The Health, and
Earthlings (graphic). Most of these are available on Netflix, except for Eating You Alive and Earthlings. Earthlings is on YouTube. Earthlings gives you a peek inside factory farming. As I mentioned, it is very graphic, but is the hard truth about factory farming.
Some great plant-based doctors to research: Neal Barnard, Caldwell Esselstyn, Colin Campbell, John McDougall, Michael Greger, Michael Klaper, and many many more.
I'm going to include a few videos for you, as well as some great YT channels, but please, go on YouTube yourself and seek out all the relevant channels and subscribe. There's way more than I'm including here. Best of luck with your new lifestyle.
https://www.youtube.com/channel/UCddn8dUxYdgJz3Qr5mjADtA
https://www.youtube.com/channel/UC_U4GPaCE59IDIqAOsvQMgQ
https://www.youtube.com/channel/UCh2D2ss44sKdb6l7iGU7eLg
https://www.youtube.com/channel/UCsudrjn6IxMFxIsgyA_HzSQ
https://www.youtube.com/channel/UCkVtuE3WR0NhNnDiP5d_pAA
https://www.youtube.com/channel/UCGJq0eQZoFSwgcqgxIE9MHw
https://www.youtube.com/channel/UCeckeH_lF6uh8i37YK7P46g
https://www.youtube.com/channel/UCjT_puAbUNfU_LUONgr0xkw
https://www.youtube.com/channel/UCh2CcI5FT661MGIrZCxNeTw
https://www.youtube.com/channel/UCuwi1gSKyqz28BVCc9qeuIA