Gearbox gremlins

[Jon8710]

Hello all
So after a year and a half of trouble free driving the gremlins are starting to rear there heads.
The gear box is starting to play up abit when getting going from cold,
I noticed a while back that when approaching a roundabout or junction
The box would not select 1st, If I popped it to N then back into 1st it would go back in but once up to temp it seems to go away.
Also it box would some times make a big clunk from 3-2nd bigger than normal
Anyway it would almost feel like it was a little stuck.
The other day I went to drive out my car park and and reversed then went to celect 1st and it would show 1 on the dash but just rev !
I moved the celect or about and it wouldn't go into anything it would just rev.
I turned it off opened and shut the bonnet a few times and left it for a bit and it seemed to sort it out.
I have also noticed that when cold dropping down the gears all are fine but from
3-2nd it will go 6,5,4,3 then jump to 5 instead of 2nd !
This seems to go once up to heat though.
I understand this will be more than a job for the home mechanic and its in for a servics soon so will get the G-dog to have a look but was just wondering if anyone else has had similar and also will it cause further damage if I drive it ?
Like I say it's all good once up to heat.
Cheers