I don't think you can go too wrong with any "line" of paint from either Orange/Blue construction store. I've used most of them with decent results. Valspar, Glidden-Diamond I like a lot. Behr's good, but you don't have to get the $50 stuff. I am a satin sheen on walls guy. Satin cleans a bit better than flat. Less scuffing. Flat/eggshell on ceiling. Semi on trim/doors/base. Some of the color matching, issues, has to do with proprietary colors of the diff brands. It's hard to cross-match. Just get a color that you like is best. You can have primer tinted (cheap) then go over the walls with the color/finish. Rolling walls with primer doesn't take long, and you dont have to be perfect. I'm not a huge paint+primer/expensive guy. Just not convinced. Although, im sure it works. Would you rather have 2 coats, or one? IMO.
Some tips: I like 1/2" nap on rollers (try to avoid cheap rollers) and run the roller on masking tape to get the lint off. Hold tape with knees, and roll off 3', and run the roller on it until there is no more lint. 1/2" has good texture and holds fair amount of paint, 3/8" not so much.
When you are patching>> hold light/flashlight to "see" imperfections, right against the wall/down the wall will show stuff.... and you can use the cheap fluffy spackle, or regular drywall mud if you have time to wait for it to dry. Cheap grey foam sponges are good to sand smooth (smooth grit). Then, if you have a lot of patches.. do a rough "stipple" with a brush on the sanded patch... then... when you go over it with the roller.. it will have some texture to the rest of the wall and blend in better.
A 3M tan tape+ paper masking machine can really save time to cover doors/baseboard. Upfront a lot $.. but paper/tape is cheap.
The $12 kit with roller/pan/brush can be a good deal to get started, and a 4' extension is super for the ceiling. Don't rinse a used roller. They are not free, but just use a new one with a new color/paint. You can double bag a roller and use it a month later if you want.. that's okay. it can't dry out.
And the cheap "painters" caulk is good... don't need to overspend there... just dont make a big hole on the tube... just tip of pen sized... you can always do another line of caulk but too much is not good... Also ... you can mask off when you are caulking... that helps.. for a clean line.
Hope this helped. Have fun, and a lot of cold beer (ice tea).