It does not seem like a good first cycle. Tren is a very potent steroid that can have a lot of side effects; as such its rarely recommended for a first time cycle because a first time user isn't as prepared for dealing with sides. Secondly, the enanthate ester means that its going to be present in your body for a while. If you do experience bad sides, tough shit. You'll have to ride them out for a couple of weeks due to the long estered tren. Most people who are starting out with tren use tren acetate so that if they experience harsh sides they can quit quickly. But I still wouldn't recommend that for a first cycle. Get a cycle or two with test, maybe an oral under your belt to figure out how your body responds to them. You'll be glad you did in the long run.
Also, I really don't see many 1" 27ga needles out there. Thats not to say they don't exist, I just don't see them. You can either use a 25ga 1" needle or if you're fairly lean, you can get away with 29ga insulin needles. You should also use 29ga insulin needles for the subq HCG shots.
Also, FYI, subq shots are (in my experience) much less painful than an IM shot.