New member

Hi, and welcome to MFP!

A good starting point for learning to use MFP for weight loss is this thread:

http://community.myfitnesspal.com/en/discussion/1080242/a-guide-to-get-you-started-on-your-path-to-sexypants/p1

Don't be put off by the joke-y clickbait title: It's solid basic info.

For muscle gain, there's also a good thread with recommended programs here:

http://community.myfitnesspal.com/en/discussion/10332083/which-lifting-program-is-the-best-for-you/p1

The community in general is very friendly and helpful. Ask a question, you'll get lots of answers/opinions (probably some of which you'll like, and others you won't 😆, because they're pretty diverse, but just scroll past what seems unsuitable to you, and find things that sound more workable in your case).

Wishing you much success!