so i'm a soccer and tennis player and i've been noticing that gaining muscle would definitely help me improve in both sports. i was only about 97 lbs a year and a half ago, but then i started doing bodyweight exercises (pull-ups, chin-ups, squats, push-ups and crunches) and now i'm 5'7 and 115 lbs. now my gains have started to slow down and i think its time to start with actual weights. . i'm looking for exercises that will help me gain some strength and mass to my arms so i can hit a tennis ball harder and also some more upper body strength so i don't get pushed off a soccer ball so easily.
i'm looking for a workout plan with weights but many times our school closes the weight room for a variety of reasons, so i want to have a back-up plan, maybe just bodyweight exercises so if the weight room is closed on one of my workout days, i can go home and work out.

for tennis you should aim to work both the arms and the pecks so pushups, chin ups and the like are good bodyweight exercises

sounds good except i kinda already do those haha.. i want to start with actual weights and what would be good for arms, pecs, and maybe legs