Nahihiya ako mag gym.

Hi! I'm 21/F and planning to enroll sa gym since that's one of our benefits in our BPO company. Gusto ko pagandahin yung katawan ko and i really wanted to gain some weight kasi di umeepekto mga pampataba sakin and i think going to the gym would help (correct me if i'm wrong). However, nahihiya ako mag gym kasi feeling ko baka pagtawanan lang ako ng mga tao sa gym. I am 35 kilos only and i am 5 flat. I literally look like a grade 7 student and i'm not even exaggerating. I just bought my gym wear and i'm kind of excited and sad dahil nga iniisip kong pagtatawanan at ijujudge lang ako ng mga tao don. I would like to hear your thoughts and advise. Badly need talaga.