If you haven't done it yourself before it might be a good idea to hook up with someone familiar to walk you through your first time to avoid any OOPS moments.

Routine 4.5k maintenance in addition to the oil and filter change should include checking your air filter, all other fluids, tire pressures, tire rotation (every other oil change), and a few other nick nacks.

Are you the original owner of the X? At 115k it should be due for a timing belt/water pump change out and a full tune up if it hasn't been done already.