The Goods (aka, TGsoGood, on this forum) YouTube channel has a lot of good video tutorials for various things ->
https://www.youtube.com/channel/UCPydhZ ... PeRSmEVynQI would start with following the instructions (and maybe a YouTube tutorial) for installing looyh's Hook and getting comfortable with the general process of loading mods, with particular attention to other people's work in the areas you're most interested in.
Specifically regarding the two areas you mentioned, TGsoGood does a lot of work with custom courts. Also, re: Ringers/Ballers, offhand I don't know what triggers those names for practice / blacktop squads (i.e., whether they are actual team names tied to the roster or if they are just hard-coded text strings), but if they're team names, you should be able to edit them with 2K Tools under "Teams". If not, you could simply hex edit those text strings. I'm new to modding / NBA 2K on PC too and made a thread about text-editing recently in which Mahmood provided some helpful tips ->
viewtopic.php?f=272&t=113155I'm happy to help with anything further on that front if it's confusing. Just ask (maybe in that thread, since it's specifically about that topic).