Here's my tips:
1. If you have scars (not keiloid scars though) get a product called bio-oil, it basically helps dissolve them, it also works on stretchmarks too.
2. use castor oil to grow your hair as I've started using it and my hair is down to my waist and normally it doesnt grow fast.
3. Find a skincare routine that suits you and your skin type. a lot of influencers use the same products, but they may not work with your skin.
4. Exfoliate before you shave and moisturize after, trust me, it helps with strawberry legs, also make sure to replace your razor.
5. Drink water. Water actually has many benefits and not just keeping you hydrated. Don't bother with the 8 cups a day thing, it was dissproven years ago, just drink as much as your body needs, not in one sitting tho, stagger it through the day and you'll find your less tired.
6. Look at what base your makeup products have (liquid or cream wise) as some use silicone and some use water, you'll find either aqua or silica, its not recommended to mix them. you can also get oil based too.
7. if you use silicone based products, oil based things work best to get it off
8. Eye bags can be genetics, so you may be unable to remove them, however you could use a tan colour corrector under your makeup to camoflage it better.
9. Hair does not need to be washed everyday, if your hair gets greasy the next day you haven't found the products for you.
I did makeup for two years in college, if you have any questions, feel free to ask :)