How do i set up a database for my daily work hours?

i think it should be an easy thing to set up but i dont know where to start, is all iwant to do is have a spot for mon tues wed thurs fri where i can put my hours ie 8-430 my normal hours ie 8 hrs and my o/time hrs ie 30mins (in this case uming i worked 8-430 with no lunch), i want it to aculate my normal and overtime hrs so at a glance say in 6 months i can look at it and see how many o/time hrs compared to normal hrs have been done ( im on a wage now and only get my 40hrs pay no matter the hrs done i just want to keep a track if its fair) i hope your understanding my blabble thanks for reading hope you can help sheers