heya, good to know that you'll be doing some more prep before you get iont the spawning thing, it does take a lot of work.
You can easily get a plan 10g without all the fancy stuff for like $12.99, you can make ur own hood or just cover it wtih something, and put a sponge filter in there and a heater. Set the temperature to around 80F, fill the water half way (around 6 inches or so). Make sure it's bare bottom (no gravel or sand or anything like that)
Put a lot of palnts into one corner of the breeding tank (perferably liv eif you have any good live floating plants too). Take a styrofoam cup, cut it in half and let it float int he tank. Now your breeding tank is set up.
Say you'ev conditioned both the male and the female, put the amle inot the tank, and flaot the female in a clear container of some kind so she can see the male but the amle can't attack her.
Leave it like taht for about 12 hours (usually overnight), to give the male a chacne to build his nest, and then when you see that his nest is build (usually under the cup), release the female, and they 'll most likely flare and chase at each other. Dotn' be worried becuase some aggression is normal. Some, but not excessively. If you see the female taking a lto of damnage, remove her.
The time betweenr eleaseing her and having them embrace really varies a lot. Soemtiems it takes a few hours, sometimes it takes over 12 hours. You might find yourself recupping her if the male gets too aggressive, so that's normal.
Once they embrace, and they're done, the male will tend to the egg and the female will run away and hide, that's when you take her out but e careful not to ruin the mal'es nest and eggs in the process.
Anyways you should check out he pinned toipc at the top of this fourm for the article written by wuv on breeding bettas.
Trust me a 10g will be the safest bet for you, do you have a 30-40G growout for hte fry? tehy ca'nt live in a 1G they'll be stunted. Betta fry needs a lto of room in order to grow.