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FutureIdol there's more than one type of muscle development.
Some build for bulk (low reps -high weight).... Which is usually low value muscle.
The other way is to tone.
Callisthenics is a good place to start.
It works mostly on core muscles.
And you don't need special equipment.
Any weight exercise that uses High reps with low weight,tones and refines... Strengthens muscle fibres without tons of bulk - and burns calories....
Even things like yoga is good.
It refines form, is wonderful for flexibility and balance, but also strengthens your body (and mind 🙏)