There's no rule I know of that says methandrostenolone can only be run for short time periods, in fact with correct medical supervision could probably be run safely for a much longer time... and "front loading" is a complete crock. If you are already lifting and making steady gains than there's no point to "front load" anything. You can't wait a couple weeks for the magic to "kick in"??? (not that there's much magic to it). Heck, if you were to use a short ester or combination you wouldn't need to front load at all. Even then, you'll not notice much "kicking" but you should see some strength/endurance gains over time with good diet and proper training. You sound like you need to discuss this with a professional and then maybe hire a trainer that can help you with diet or training. Otherwise, you're just going to lose the weight you gain anyway.
This is really a beginner question and few people can legally advise you on what you are doing there but gains take time like everything else does. With or without drugs. But I doubt you'll notice much of a difference in less than 3 to 6 months no matter what you do so getting "front loaded" a week or two earlier isn't going to mean much now is it?