Thanks Punkal - with the bulk priming - I'm assuming that would mean making up a wort with the LDME? or just put the powder straight in each bottle portioned out. How much difference does it make between carbonation to use sugar vs dme? how important is bottle fermentation temp? once they have bottle conditioned do they need to be kept at a low(ie 18-20, not summer) temp?
You can put the priming sugar in individually but a process called balk priming if done correctly will give you better results, it is also less work and quicker than putting sugar into each bottle individually.
LDME is about 70-75% fermentable (approx) so 30-25% (approx) deference would be technical answer. There is no difference to carbination level you just have to use more DME then sugar.
Storing at the correct temp will help with aging the beer, the beer will taste better for longer if stored at the correct temp. To hot is bad and will cause the beer to go bad quickly as this is one of your first batches this will probably not happen as it will not last long. Fermentation temps are required for carbonation after a month cooler temps are good but you really don't want the bottles above 25c max (people do it and it works for them but its not ideal so avoid it if you can.
Quick and dirty bulk priming guide (if it sounds like something you want to do try searching for a better guide)
Extra things you will need
A extra fermentation fermentation bucket
PVC hose 1.5m
Process
Sanitize the extra fermentation bucket and PVC hose.
Bring 250ml of water to boil in a medium sized pot.
Measure out your priming sugar/DME.
Turn off heat and add priming sugar to boiled water and mix until all sugar is dissolved.
Add the priming solution to the bottom of the extra fermentation bucket.
Put the hose onto the tap of your primary fermentation bucket (bucket on the bench) place the hose into the extra bucket (bucket on the floor), there should be enough hose to leave a coil at the bottom of the bucket.
Drain the wort from the primary bucket into the bottling bucket, the coil should cause a little whirlpool this will help mix the sugar evenly. Avoid splashing, if you have a cardboard flavor after a few months you splashed to much.
Allow it to sit for 1 to 2 hours, this allows the priming sugar to mix more evenly. Good time to get the bottles ready and sanitize them.
Bottle as normal.
You can find out how much sugar or DME to use by using a calculator there are plenty of free ones on the intertubes, I use the calculator in beersmith2 (not free but has a trial).