One of the first grammar points you should work on are indirect object pronouns. Why? Because it’s a mistake that’s relatively easy to fix.
A common mistake is to say:
Je vais donner
à elleI’ll give (to) her
Je vais donner
à lui
I’ll give (to) him
You have to say, for both genders:
Je vais lui donner
Lui and leur
Indirect object pronouns are not that difficult…