You’re starting to get a good roster there. Work on maxing the 3* you have and any others you get. Then the next Challenge event/Seasonal event you’ll be able to compete that much better. Then you get better rewards such as ascension materials and trainer heroes.
Another thing to note is best way to level up heroes. Especially for 3* you want to try to get the special attack leveled up to 8 as well. There are many threads on the forum here about that to read up on.
Here’s a good one:
PS: there are no silly questions if asked in earnest.