Welcome to the humble gamepress Arknights community.
1- First of all, congratulations on your first 10x roll, you got excellent luck.
The first chapters of the Story have special mission called “training” that will explain how to use your operators and what to do with each different class.
2- Low rarity operators are good. Don’t let other people tell you otherwise: this game requires more stategy than FGO. If you choose the right skills, party composition and place your operators in good places (messing up here is going to cost you dearly)… you can beat anything with low rarity operators (save maybe some particularly challenging maps)
I advise, for example, to use your Melantha (4th from the right of your recruited operators). She is my favourite operator: i use her even in late chapters and she performs very well. An example of low rarity but good.
Also, in this game you need to use DP points in order to place units in the battlefield. Each DP is gained more or less each few seconds.
Low rarity operators are cheap, so they requires far less DP points than rarer units. This means you can create mixed teams in which you exploit the cheap cost to defend your positions and buy time until you can place your stronger units.
4- Let me explain why your roll is exceptionally good:
You got Meteorite (third from the left), a strong AoE sniper that can injure/kill multiple nearby units per hit.
Shirayuki (first from the right) is exactly like Meteorite, but lower rarity so weaker.
You got Exusiai (second from the right) that is excellent at wiping out normal mobs in a short time.
Then you have Projeck Red…well, she is more complicated. Learn a bit how to play the game before using her properly. But in short she is a master of fast redeploy. Meaning, placing her, dealing damage to someone, retreating her, placing her again somewhere else.
Anyway, have fun.
Also, if you want to know more about the operators you rolled: