Welcome to Elite Fitness resurrection. Without knowing your previous weight lifting experience, diet and training it would be hard to asses your situation. At 6.2 300 pounds it appears you are overweight and in need of a major diet overhaul ( which includes no fat and high protein meals. check our diet section out for suggestions).The fact that you add test cypionate to your mix will not produce any gains for you without first shedding your weight and more importantly reducing your body mass index. Your second question is yes , it may raise your blood pressure however at a low dose it will be slight.My suggestion is to start doing a 5 day a week cardio routine which includes running and change your diet completely. Steroids do wonders for people who have low test and who are already in relatively good shape however just adding Test Cypionate, will not yield the type of gains you are seeking without first getting in shape and losing body fat. I have gifted you a platinum membership to make navagating the site easier. I encourage you to check out our diet,weight training and meal sections of Elite. Best of luck to you, and Im looking forward to following your success.