Welcome to the site.
Suppose you would need to decide what you want from the car ie. daily, track slag, concours, ICE etc
What's your budget and can you do the majority of the work yourself or can your mates with beer bribery?
What will insurance be like? There lot's of different factors needin to be taken into consideration before starting.
Personally as it's already stripped out I'd go track slag an ABF, perspex windows, buckets, wide-track, white compomotive rims, respray red and proper 'cage.
Then get out and enjoy it as much as possible.

Pretty blank canvas though.