Start light 30-35lbs
Start long 62+ inches
Get some lessons and/or buy Tom Clum's course
Jake Kaminsky has a ton of free info on YT
Find a friend/shop/group that can help you out
You might want to check out Clay Hayes’ YouTube channel too. He’s got a lot of good info.
I’d recommend starting out with a recurve. Get a three piece so that you can upgrade limbs from an original light weight later. I’ve not got any experience with the ILF bows, but they might be a good place to start. You can pick up decent limbs without spending a lot.
As mentioned, start light. Make sure your bow is long enough to handle your draw length without stacking if you have a longer DL. A lot of people say get a Samick Sage, and they are decent starter bows. Ebay has a ton of old used name brand bows at decent prices too. If you could go to a 3D shoot and handle and shoot some different bows that would be even better. Try to find someone to help you pick your arrows so they're at least close enough to being spined correctly that they fly decent until you get your form down, etc. It's fun, but be prepared to put the work in!! Takes a lot of practice. Annnndddd it's addictive and don't let anyone tell you it's cheaper.
Rms gear the home of Tom Clum does a sweet deal with the Samick sage bows and will do limb swaps with you as you build you weight up for a nominal fee. As other have said start light ish I would say 35-40 if you are shooting a 70# compound. I second the recommendation for the solid archery mechanics course, and it will get you going in the right direction. I know it’s not possible for everyone but if you can make a trip to Denver and get a one on one with Tom, Alex or one of the other great teachers at RMS gear it’s really worth it. Take your time and don’t jump into a custom bow right off the bat…it can be expensive…believe me I’ve done it…and am on my 6th or so now at this point. When you feel like you wanna jump down some of the companies offer a trial program, which I recommend to try different grips and setups. Ultimately I recommend a low and flat grip similar to a compound grip vs. a higher wrist grip. If I can help with anything let me know I’d be more than happy to answer any question.
i recently just got into shooting traditional bows and was an avid compound bow shooter. i have only been shooting trad bows for about 3 weeks and it is much different for me than compounds. in my opinion so far there is so much more little things to learn and to concentrate on doing extremely consistently to get your shots to be consistently accurate. it takes a lot more attention to detail for me than compound shooting was to learn but i am definitely enjoying it a ton. i am getting very good groups out to 30 yards in just a short time but i do shoot twice a day and really try to focus on everything.
i agree with what others have said start with a lighter bow where you can learn correct form. i picked up a Damon Howatt off my local craigslist for a reasonable price and luckily a few friends of mine let me borrow some of their trad bows to try out. Tom Clum, Push Archery & Clay Hayes have some great content on YT.
A Samick (now Galaxy) Sage is a popular starter bow, but if you think you're going to stick with traditional archery long term, an entry level ILF (international limb fitting) setup might be a better starting point. ILF gives you a huge array of options for draw weight, riser/limb length, and riser/limb material.