"1-This will be my first cycle and using testosterone will provide great results, but will limit future growth."
what the f...???????? i'd sure like to hear the reasoning behind that statement.
"2-I can't get my hands on sustanon."
good, sustanon sucks compared to single estered tests. but most newbies get caught in the "more is better" myth and use sust anyway.
"Can anyone provide information or advice on this cycle, Or whether it would be worth mixing some testosterone in as well?"
what cycle? i don't see a cycle!!! you haven't given any details.....no duration, dosages, PCT plans, no structure whatsoever.
it would also be helpful to list your stats like age, height, weight, gym numbers, goals etc etc etc.
and IMO test should be the base of any first time cycle.
you need to put some actual thought into this, and make an effort....or you won't get much help from anyone.