the owner of the gym is no friend of yours.. only someone very ignorant or devious would recommend deca for a first cycle. but to each his own. when you are shutdown for 3 months and have no libido maybe you will learn the way dozens of people that have PM'd me have learned. I've gotten too many deca horror story PM's from noobs who went into a cycle inexperienced and came out wishing they had not done it.
you want advise from someone experienced with deca? that would be me. I ran 2 cycles of it.. I got great results.. however I will NEVER run deca again. not worth it.