Assuming you know the basics;
1. Forget the bubble nest and forget the female's shape - they're meaningless..... oh one thing matters; what size are they? (approx) - younger pairs are often more difficult to breed.
2. Isolate all - mainly your breeders. Don't let them see other bettas during the 2 week conditioning period.
3. After they're conditioned, setup the breeding tank - up to you. Since it's your first, use tons of live plants on one side of the tank as hideouts for the female. Place the nest area opposite the plants.
4. place the male in the tank and the female floating. .... IMPORTANT.... look how they act. Are BOTH flirt swimming or is only one doing so? If both are flirting, let them be. Otherwise take the female out.
If BOTH are flirting; release the female just before dark (don't use extra light). Let nature take its course. It may take up to 3 days (or more) for them to spawn - don't worry, the thick layers of plants should protect her.
If the female is trying to fight, take her out and introduce again the following day. Do this until the female flirts (she will eventually flirt if the male constantly flirts).
If she changes into stress stripes, take her out and isolate her in the dark for a day or so. Then flare her to another female. Repeat flare exercise until 3 days or so. Then Reintroduce to male and see how she responds.
Good Luck and keep us posted.
Please don't get offended. We can only really help if we know how much you know .... it helps us organize our explanations. And we can never explain every single thing, so usually we ask new comers to at least read the stickies, then ask a more specific question.