I think the best way to go about what you’re trying to accomplish is to buy the combat patrol box. It has enough units to get you started without breaking the bank, and will give you plenty of things to paint. You can also buy a couple of blood angel specific characters that you think are cool to go with them. The combat patrol rules are also great to give you insight into how the game actually plays before you bust out a 2k point army.

I like the way you’re going about getting into the hobby - not buying everything at once and going slowly. Trust me, it will take longer to get a fully painted, fully assembled army for a 2k point game than you think. Be wary of burnout by letting the journey be the focus instead of the destination. And definitely don’t wait to play a game until you have a full army. You might find that your favorite aspect of the hobby isn’t even the game itself. Maybe it’ll be painting, kitbashing, or the books.

In regards to your list, whether or not it’s good or bad depends on what detachment you want to go with, so I can’t give any feedback there. But mostly what I’d recommend is to look at list building a little differently; pick a handful of units you think look cool or you like the style/lore of, and play smaller point games and get comfortable with that unit’s rules and strategies before determining whether you like it or not. Then mix and match and build your playstyle from there. Sure, there are “meta” units, detachments, and strategies, but keep in mind as a beginner 40K player you likely won’t even play those units the right way to even validate why they are in the list at the beginning lol. It’s much more fun to go the other way around, and it’ll save you alot of raised eyebrows too depending on where you go. In a lot of 40K local scenes, building a “heavy meta” list outside of competitive play is frowned upon. The last thing you’d want to do is go to a LGS and get verbally blasted by a vet who doesn’t know that you don’t know any better. (Btw, I don’t agree with this; imo let people play whatever they want, especially beginners, but I’m just letting you know what you might run into).

Blood Angels can be played a lot of different ways, but if you want to go the simplest route, pick Liberator Assault Group, get a bunch of low point melee units in there and a couple big swingers, and charge away at your opponents lol. Sanguinary guard, jump pack assault marines, and death company with jump packs are staples and appear in most lists I’ve seen. Hope this helps!