a stickler for (doing something)

A "stickler" is someone who insists that everyone follow the rules. You can express what kind of rules the stickler makes people follow with the phrases "stickler for ___" or "stickler when it comes to ___":

My boss is a stickler when it comes to correct spelling and grammar.

She's a stickler for punctuality.

The correct preposition to follow "stickler" is "for", but sometimes people use "about":

I'm a real stickler about keeping the kitchen clean.

The word "stickler" sounds a little negative, but it's not rude or offensive.

kind of a (something)

"Kind of" means "a little" or "somewhat". It can be followed by an adjective or a verb:

I feel kind of obligated to go.

I kind of wanted to go with them.

If you want to use a noun after "kind of", say "kind of a ___":

My house is kind of a mess.

I've always been kind of a nerd.

get to work on time

A lot of jobs have a specific time when they start. Arriving to your workplace before the starting time is called "getting to work on time".