When usually is unusual
In my spare time I usually go out with my friends.
This is grammatically correct. However, if you're talking about something you do regularly or habitually then present simple tense is all you need:
In my spare time I go out with my friends.
Indonesians will feel a need to translate biasanya, but present simple tense already carries the meaning of usually, and so usually is redundant in a sentence like this.
Only use usually when you want to make a contrast between something you do habitually, and something unusual that you have to do because of exceptional or unusual circumstances.
In my spare time I usually go out with my friends, but today I have my IELTS interview.
(You don't usually have an IELTS interview..)