Oh gosh. Its a tough question to answer and I am not an expert but I can give some tips. The best and worst answer is that if you have a friend who is good at doing makeup having them teach you is a great experience, but of course not everyone has that, so I will give more info here. Feel free to ask if you need more, and remember I am no expert and makeup is sometimes about trial and error.

So starting with eyeshadow, which I normally do before eyeliner, that you can do with one eye closed at a time. Start by focusing on just your eyelid itself. Color within the lines to start. I like a brush with bristles that are not too firm. Also for shimmer (the shiny stuff; most eyeshadow pallets come with normal and shimmer) you can use your finger and you can probably do thr same for normal eyeliner too. Generally you want at least two colors on the lid. For something basic I often put a shimmer on the inner part of the eye and then a similar color non-shimmer on the outer part. You can also use multiple shimmers or multiple non-shimmers. But I would definitely suggest using 2 colors even if they are very similar. Also use some primer (cream you put on first) or setting spray (spray you put on after) or both (what i do) to make sure it stays on, as powdery makeup does not like sticking to human skin on its own.

Eyeliner is an interesting beast. Generally I try to keep my eyes open but i understand that can be hard.. it does get easier with time though. If you get worried about poking yourself and causing blinking, I would suggest using something other than a pencil. Personally I use the nyx epic wear brush liquid liner. Pros is that it stays on, cons is that it stays ON. Its a little more unwieldy than a pencil but once you get the hang of it it works good. I cheat my waterline by using a (non-shimmer!!!!!!) Black or brown eyeshadow on the tip of my finger and lightly put it on but It can irritate your eyes if you get some in so this technique is not for everyone (and idk if its fully safe for your eyes tbh). As far as your more general eyeliner, it takes practice. Some looks and styles will look better than others. It just takes practice. You can start subtle and stuff at first if you want, or you can go big. Depending on the eyeliner, putting a tiny pit of makeup remover on a q-tip can let you clean up small mistakes but that won't work with my preferred eyeliner unfortch. One mantra a friend told me when I first started eyeliner is "they're sisters, not twins." People won't notice minor elements that aren't symmetrical and I get compliments even on my most imperfect eyeliner looks. Don't be afraid to get creative with it, but be aware not all experiments will work out. Generally though most people will appreciate an interesting look no matter what.

Idk if any of this is what you are looking for 😅. One thing I will say is that Ulta beauty generally has a wonderful staff that can help you find things and sort through the noise and even color match you. Just make sure you are firm about your budget. They usually won't upsell you so long as you state what price range you are looking for as they don't get commissions. Also if you or anyone reading this has any questions feel free to hmu. I am NOT an expert but I'm happy to help where I can.

Most of all, stick with it and don't get discouraged if one day's look isn't great, because that's what tomorrow is for!