The only real advice I can give you is:
1. Practice a lot, practice, practice and more practice. Never sing if you aren't listening to yourself you may do it wrong and ending up getting used to it and the it would be hard to fix D:
2. Don't force your voice know how far you can go whit out hurting it.
3. Try to sing wile sitting straight on a chair. The reason for this is that singing on a sitting position is harder then doing it standing up so if you do it properly wile sitting straight it will be easier for you to do it standing up. Also, when singing try to relax your body forget nervousness and it's always good to move along whit the music it helps you get in the mood.
4. Take great care of your throat and voice, if you are sensible to cold wether (like me) then try to stay away from it or at last to stay warm.
5. When actually recording do it standing up. The sitting thing its only for practicing.
Well Maybe I can think of some other tips later. If so I will probably edit. By the way... I love singing. If you like you could listen to me em... some other time xD right now I don't feel like searching for something. Thought if you want to just tell me and I will post it some where

Well hope the tips are of help.
Att: Loveli<3