Good evening HF80.
There is no need to worry.
As its easy to 'stick all the bits' on a fly rod or any rod for that matter.
The worry bit is making/designing the rod, the graphite tube.

The biggest suggestion would be,
1 to be totally clean,
clean ALL dust from everything possible.

2 use as much light as possible when working on the blank/rod.

3 don't hurry, as you have nothing to prove and the fish will be still there the next day and the day after.

4 file down the feet on all your guides till they are slim and pointy.

5 not sure, ask or read...

its easy, really.

Kind regards,
UB