Having done a Kickstarter myself, I would recommend not doing one until:
-ALL the comic pages are done and ready for print
-You've picked out a printer/gotten a quote
-Calculated all your costs (printing, shipping, paying people, ISBNs, barcode, merchandise costs if you have them)
-Done a TON of research. Seriously. Do research into rewards, videos, time span, marketing. There are a ton of articles out there to help you maximize your chance of success. Also just browse Kickstarter. Look at campaigns, watch their videos. Grade them, take notes. Would you back this? Why or why not? And set aside personal taste, of course.
Also something to think about: Try to avoid doing it at the end of the year, because if you get paid in November and don't use the funds to print your books until next year, you'll have to pay taxes on it as if it's profit. (taken from personal experience)
I personally think it's fine to do Kickstarters for comic volumes. That's common and it's like a glorified preorder. I wouldn't do it for anything less than a volume though, there's simply not enough profit margin on issues and people aren't willing to pay that much for it.
That said, I really advise against relying on your online community. Tapas especially has a lot of casual readers that don't commit monetarily, whether it be through Kickstarters, Patreon, or buying from online stores. I've heard this from other creators and experienced it myself. You get maybe a few who will for every 1k you have.
When I did my Kickstarter, I wasn't even posting my comic online. I got 6k from about 80 people between friends, family, my professional peers, convention goers, the local comic scene, and random browsers on Kickstarter. Your connections are what's really going to carry you. If you haven't made real friends yet in comic and creative communities, or shown your passion to your friends and family, start now. Even though I've been posting online for 2 years, the people I can think of that support me monetarily from here are all people I've taken the time to talk to and get to know at least a little bit. People are really investing in you, not just your product! Especially when you're starting out.