just try your best to get most recent parts keeping future proofing in mind like getting i7 processor for example or getting minimum 16 GB ram and for your power supply get at least 1000 watts gold rated is good no need to go higher from sea-sonic and forget about it. for graphics get the 3080 or 3070ti i mean to say high end but whichever is comfortably in your budget. i was feeling the same when i built my first PC back in 2010 and i did not have much resources, nowadays its easy to get help from online sites like this one and redit is also useful. what i did which ever part i choose to buy i search it on YouTube and check reviews from your subscribed channels. go easy on spending first time because when you get into stuff you gain knowledge overtime and then you can update your existing setup with more parts you feel like will better your experience for example display, fans, cpu cooler . so just go for it even if you make mistake you are learning from them.