You'll have to look at what is available where you live. If possible I'd invest into a soldering station. The affordable ones are just a little bit more expensive than a good iron. Personally I've bought an ERSA RDS 80 station. But that's an expensive one and mainly because I use it quite a lot so a good station was on my shopping list anyway.
A solder with silver in it is IMO easier to use, so for a beginner that may be a good idea although those types are obviously also much more expensive. Don't use anything with more than 4% silver, as those types of solder are too expensive and are too weak mechanicly. Note: If you decide to get a leadfree solder, remember to get the corresponding tip also. It'll last much longer. It'll also help if you use steel wool to clean the tip instead of a wet sponge.
The kits are all wire through hole, so IMO the tips' size isn't that critical. I've used a thin 0.8mm tip for the opamps and the big chisel that came with the ERSA set for the Placids' heatsinks. A 1mm normal tip was used for everything else.
I would recommend getting a little solder wick to unsolder things, and a decent wire cutter to remove the excess wire.

Hello!

Total noob here also..

I would like to know if it's enough for a buffalo 2 minimal approach if I only get one placid, one non bipolar toroid transformer and one b2 kit to feed a naim nait 5i integrated amp using using a Hiface as the source?

Thanks in advance!