We recommend that you start by reading Design With FontForge before moving on to the documentation on this page.
Post a new issue on GitHub if you're stuck and the documentation and a websearch didn't provide any answers.
FontForge is a free and open source font editor brought to you by a community of fellow type lovers. You can donate to support the project financially.
Anyone can help! You don't have to be a programmer. If you want to help but don't know where then post a new issue and introduce yourself.