how should i start working out?

im 15, and 5′4″ havent really worked out in ovewr a year (and thats because i had fitness class)
im extremely lazy when it comes to working out, but i really want to (so im also lookin help for motivation).
i have no fitness equipment, so i guess i should do cardio, like push ups and stuff.
wait actually i have weights, but idk if i should use them.
I just want muscle definition for now, maybe bulk up a little.
help please.
oh and i wirght 113 punds.
light, but not anorexic lol./












start slow… some cardio and light weights and after each workout u should be able to slowly increase reps/intensity/weight
so you want to get cut, but not buff right? first, start by doing some jogging around where you live, to burn excess calories. stop eating any fast food crap, as it slows you down. as for the weights, find the right amount of weight that it is so challeging that you can only do 15 reps(how many times you move your arms to the exercise). i recommend you do 6 sets so
15 reps
rest for a minute
15 reps
rest for 30 secs
15reps
rest for a minute
15
rest for 30 secs
15
rest for 30 secs
15 reps
this should help you begin defining your muscles and you will start to see changes around the third week.
good luck.