I've been wanting to learn welding for a while too. I agonized over whether to get MIG or stick, etc. My available budget held me back for a while. I was ready to get a HF welder but sooooo many people said that I'll just out grow it in a hurry and that I should just continue to sock away money. Once I got some nagging bills paid, I just stuck with patience and kept my eyes out for good deals. I like Lincoln (I guess the red color...??) for some reason but I'm not a brand snob by any stretch. I decided that to look for the power mig 180 dual. It runs on 120 and 240v, can do flux if I need that, etc. Seemed like a versatile machine. I considered the power mig 210 MP because it does stick and TIG as well, which would be nice to have all in one machine, and it gets good reviews. But, It's only 240v, I wanted the 120v option.
I recently build a garage/shop and had a 240v welder circuit put in so I'd be ready. The catch is they put in a 30A circuit, but I need 40A for 240v. Oh well, no biggie. I'll just re-do that circuit. So be aware of what you power needs will be.
I lucked out and found someone on CL selling the exact machine I was looking for. I was out of town when I saw it and it was still available several days later when I could get it. Yipee!
If you don't have any accessory gear (gloves, mask, etc.) consider that you can probably buy a welding package that includes some of that stuff. If you wind up buying new, that is. I know the Lincoln power mig machines come like that. Go to your welding supply and ask them. But keep your eyes on CL, it just takes time.
Also, I wanted to stay with lincoln or miler for ease of parts and repair. Any LWS shop will carry the reds and the blues. The vulcan welders from HF are getting decent reviews but they are more expensive and for what you pay, I feel like one should just put away a little more cash and get a well known brand pedigree, IMHO.
Once you have a machine to use, look up metal suppliers. There's one near me that sells beginner packs for $15. They have assortments of plate and tube to get some good practice. I'll bet most other metal suppliers do something similar, or would cut you a deal on small off-cuts for the same purpose. The guy who runs the "homesteadonomics" YT channel has access to an incredible industrial metal supplier (He's in AZ I think). It's like a metal grocery store.... so jealous...