For many, weight loss (imho fat loss) is their primary goal starting their fitness journey. For some, they are struggling to gain weight (getting lean muscle) from skinny to fit.
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Pic on left was exactly how he's frame was before he started lifting, Pic on right is after Steve Rodgers turned Capt. America. A year into lifting, gained more than 10kg of solid lean body mass from consulting with me time to time.
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yes, it can be done. if you have questions drop the comments. i'll take out the guesswork for you from Steve Rodgers to Capt. America 😉