Bat withdraw or buy crypto

Hello guys! I’m new in this world… My english is bad too :joy_cat: so… i earned 0.4491 Bat and from
gemini i do a withdraw in the brave wallet… because from gemini isn’t optio to withdraw propably for this ammount? I don’t understand how to do withdraw or buy crypto from my brave wallet! The amount is little? I copy the etherum adress but propably the ammount is little can help me
Please?