Welcome.
As already recommended, don't spend a lot on a first bow, get something used in the classifieds and learn the basics. Don't 'over bow' yourself early-on; start light, learn proper form and then work your way up in poundage.
See if you have a local archery range that has any kind of beginner's class (best $10 I ever spent a few years ago).
Then do a lot of reading and understand that this is a marathon, not a sprint; it will take time. There are a lot of great threads on this forum and similar archery forums. If you want a book on archery basics (form, selecting and tuning equipment, etc), I recommend "Shooting the Stickbow".