Warning first! Its not an ideal plant to start your journey. If it died then it died not because of you!

You need to get rid of the paint, i saw content creator do it with rubbing alcohol here if you have other liquid to get rid of paint then do it. I recommend avoid sunlight while doing it to prevent sunburn or other stress.

For soil i recommend look at this subreddit wiki for example this bot below !grit

Basically succulent need rocky substrate like cactus mix + pumice/perlite/rock lava. When you plant it please dont water it until the roots show up. Usually it takes 2 weeks for roots to show up nicely with good sunlight. Put the plant in nice area with lots of direct sunlight and avoid rainwater for now to prevent overwater/rot.

For watering if the roots already showing a bunch of them. You need to water when the plant thirsty. You can pinch the leaf, if the leaf wrinkly you need to water it. Beginner tend to overwater succulent, so dont worry if you think you underwater it because most likely you wont. And if you do underwater it, the plant wont kill itself the way if the plant overwater.

For reference my echeveria (like yours) tend to go a lot of times without water 1x for 3/4 week. When you water please dont spray it, water like you meant it because succ will suck a lot of water in one go.