I am also new here.
The only advice i can give you is to go to a club or event, talk to the people there (they are normally really friendly and helpfull).
Personally i went for HFT as it seemed a much purer form of shooting and from what i could see considerably less faffing around! Come back and ask me in 2 years time and i'll have probably changed my mind.
Look at the list of clubs, many give lessons and will lend you a gun for a trial.
Where are you in the country? If you say you are around a certain area you may get advice on which club etc.
AA S200 .177
AA S400 Carbine
AA S400 MPR FT
AA S200 .22
a bit of a theme emerging here......