i would suggest not to start a patreon too early, you want to wait until you have a decent audience (at least 1-2k subs) because then when you make a patreon video you want it to reach an audience, it will be rare that new subs will go check out your patreon video from 5 months ago.
for me personally, i don't offer any exclusive or early content for my patreons, i don't like the idea of people getting extra stuff becuase they can afford it, some of my biggest supporters are because they watchm like, share every video and sit through the ad's. its unfair to not let them get all the content.
i also don't ask people to support me on patreon, this again is personal preference but i shout out and thank every new patron in my videos and that seems enough to remind people its there and to maybe check it out
just for reference, i have a massive patreon for a channel my size, just google search Loki Doki Patreon if you want to check it out