Here is my scenario I used to weight around 200 to 205 lbs but when I moved to Brasil I jumped up to 220 to 225. I kinda let myself go but recetly I tried to lose some weight and I got down to 210 to 215 it took a few months. My concern since I lost that weight I fell skinner and kinda look skinner, but my question is if its normal to lose some body mass if you lose weight?

What should be my ideal goal weight?? Im 6'3!

I also forgot to mention its been over 6 months that I dont work out. I just walk around the city a lot! I wanted to get back to the gym what work out should i start doing?