Are there any homebrew potion-brewing rules?

For a while I have been wanting to play an alchemy-based character. I have been searching for a good set of homebrewed potion-brewing rules, i.e. ingredients, procedures, etc. Any recommendations?

There is an Unearthed Arcana for for an Artificer that has Alchemy options.

https://media.wizards.com/2016/dnd/downloads/1_UA_Artificer_20170109.pdf

It's supposedly being tweaked before being added to DNDBeyond, but you could re-create it as homebrew for yourself until then.

Here is something I pointed our druid towards, who has been using it with the DM to make various potions

https://www.reddit.com/r/dndnext/comments/3w1log/5e_herbalism_alchemy_v12_updates_fanmade/