It is very rare for someone to get patrons straight away, and like you just said, you only have two chapters. People still don't have a way to measure your reliability as a content creator, and considering patreon is generally like a monthly "subscription" to support you, then for the time being it's a hard sell.
Consider you just started literally this week. It is not reasonable to assume people will throw money at you if they haven't established a connection with you! It's been only five days!
All that is left for you is to be patient, constant, and don't expect people to pay you for it.
I have years with my own webcomic, but even when I was reliably updating, I only ever got one patron at a time tops, and my only current patron is someone that has been following my work for literal years. Sometimes it just boils down to luck.