Can I use your free fonts for a commercial project ?
Do you sell your fonts directly ?
I have no online store yet, but it might come. In the meantime, you can find a list of resellers at the bottom of each family page.
Are demo / test versions of your fonts available somewhere ?
Not from my website but you can download demo versions of almost any font family available on Fontspring, including mine.
I need a custom license, where should I go ?
Again, I suggest Fontspring. They offer clear and flexible base licenses, or can custom build one that suits your needs. They also give designers a better share, which is nice for me.
How do I access alternates/Opentype features ?
You need Indesign, Illustrator or an equivalent design software to do this. There are plenty of guides out there, for exemple here.