Help!

Hey everyone I am new to this group and am looking for some advice. I am 33 years old and I used to know what makeup to use and how to use it, but that was like 10 years ago. I am so embarrassed because I should know how to do my makeup but I have no idea. I use a concealer, foundation and a little blush on my face and rarely use eyeliner. I honestly dont even know if I am putting them on correctly and I feel so dumb. I started using lash boost from Rodan and fields so I am not really looking for any tips on my eyelashes. I have no idea what brushes to buy or how to use them. I have 2 brushes, one for blush and one for a light brown eyeshadow, not sure if I am even using the correct brush for the correct area. I have watched some YouTube videos and love how they do their makeup and I like that they contour but I have no idea even where to start for that. I guess what I am trying to ask is what brushes do you use to apply your makeup and just overall what is your daily makeup routine. Oh yeah and eyebrows haha cant forget those, what do you do for those? Here is a photo of myself and please just tell me what you think I should do different, but please be nice I am super insecure with myself but any tips or advice would help. ❤