Gym advice

Hii, planning to go to the gym, but i literally have no idea kung pano mag start. My introverted mind is too shy to start alone or if people would judge me for something wrong i did haha. Sooo can someone pls like give me some advice, i would really appreciate it. I'm trying to get out of my comfort zone.

About me: 5"10 - 74kg Just wanted to loosen some weight or gain any pecs/biceps