. . . I seriously doubt a jpeg will be too large.
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First off, you can use your scanner right? Got all the cables and have successfully scanned stuff? if so, good

Usually, scans will require editing. the GIMP is free and can probably do all that you need with it Play with the levels and histogram to make it more legible, but dont' got overboard^_^

Sometimes your ISP gives you space, if not, you can beg geocities and freewebs for hosting (and it doesn't take much, just sell your soul and your email a couple of times)

Code a bit, so that each comic can link to the previous and next.

Get somewhat known and admired, and go harp on keenspace to give you an allotment.

Make the big time

(if you need specific help with one of these steps, then ask for it;p)