Ok, so I'm guessing that your main aim is to put on some size rather than lose fat or get super strong. That being the case I'd say bulking first and then cutting is the way to go. Its fairly obvious but you will need to increase your calories.

Taking steroids will enable your body to make more use of the calories you do take in. That obviously helps but you will almost certainly need to up your intake as well.

As an intermediate you will already know how to train for maximum effects. If you can honestly say that you're training at full speed now then start a cycle as soon as want, if not then I'd give it at least six weeks to blow away any cobwebs, iron out any injuries and ready yourself to take full advantage of your cycle.

For a first cycle you really can't go wrong with a test only cycle. 500mg a week for 12 weeks seems to be a good way to start. You shouldn't really expect any sides though you should have a serm available to stop any gyno or other excess estrogen sides.

Training wise, sort yourself out a good routine and stick with it. Whether or not this is split into microcycles is up to you. You should expect to increase the volume and weights throughout.

Diet is again up to you to monitor. I'm guessing from what you said that you will need more calories than some in order to gain size. I also think it will pay you to concentrate on just building size without being too concerned with any fat gain. Within reason anyway.

So for a twelve week cycle at 500mg test cyp or enanthate you will need 3 vials. You will also need some nolva for pct and in case you need to run it on cycle to control estrogen sides. 3 packs of 30 tablets should cover it. You might want to get some aromasin as well. But nolva alone should probably suffice.

Train hard, rest hard and eat enough and you should see excellent results.

Ask away if I haven't covered anything.