Shaping body

So I'm a guy okay... when i was heavier I honestly had a nice "fat body." As in my legs had shape, thicker built, and there was plenty of *kitten*.

I have a small body already, I'm 5'1, and i don't want to loose presence. If you know what I mean. I'm already half way to my goal and i don't want to look like a skeleton.

What can i do to have i nice shape to my body. (Specifically) I don't know how to use weights and I'm embarrassed to try at the gym.


Thank you!