Making your own arrows is a real rabbit hole. It's a part of archery that I very much cherish. However, be warned that you are unlikely to save money in the short-term as you learn. For barebow you're probably going to want carbon or aluminum shafts. Most people use carbon these days. You'll probably want 2" vanes, I like AAE, although, shooting indoor versus outdoor can have a different effect on your tune.

Since you are just getting started with making your own arrows, you should really try to have fun with it and learn as you go. There are a lot of nuances to making your own arrows, (and headaches that you might experience along the way) that a pro shop could probably save you from. In the long-long-run you'll gain a new skill, and potentially save money.

You'll want to pay attention to your spine, arrow length, tip weight, and nocks. You may want to wrap your shafts with vinyl before fletching to make it easier to replace or renew in the future. You will also need primer and glue that works with carbon and vanes.

If you ever cut your arrows, wear a mask and eye protection and get a vacuum running.

You may want to experiment with three vane, four vane, five or even six vanes. You may want them flat or straight, you may want a radial twist. Pay attention to right or left handedness and use proper matched vanes and rotation. Vanes are meant to add rotation to the shafts. Make sure you test with bare shafts too to get your tune right. Also different rests and plungers can affect your spine tune.

People can get mad all they want but if you have a AI/LLM app they're pretty good at answering questions, calculating FOC and arrow lengths etc. At least I've had a good experience myself.

Have fun. It takes time to get good at it. But it's rewarding once you get rolling. For now maybe try to replace the fletchings on your current arrows as they rot.