dnd 5th – Skills of the half-elf cleric

I'm starting a new character sheet for a noble half-elf cleric (domain of knowledge) and I'm asking about skills and languages. In how many things would I be competent and how many languages ​​should I know? In addition, is it the skill bonus, does it also apply to skills I master well?

Sorry if these are silly questions lol, I'm not super new to the game but the character sheets are always where I get lost.