Check out the search function on this site as there is a ton of "free" info here.
Another good way to start is your local library. That way you can get a good idea of whats involved and more importantly, what your budget can handle. Start up costs are the big hits but maintenance can be pricey as well.
And don't get sucked in by a local LFS that bigger is better. Some members on this site have incredible Nano systems. You just have to take it slow and do your homework.
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250 gal display tank plumbed directly to my wallet
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