I agree with ninja9578.

Don't try to set the lucid world on fire if you're struggling with lucidity.. don't try to do tricks, summon people, etc. Simply go with the flow and take it all in. Get used to what being lucid FEELS like so you can ground yourself in your dreams.. that's when the tricks/stunts can happen.

You may try to increase your vividness by confidently stating aloud "increase lucidity" or "clarity now" but that would be the extent of control I would recommend for struggling dreamers.

I know when I first become lucid, I too have to fight that initial rush of adrenalin. I do this by telling myself to calm down, breathing naturally (or a little slower) and I try to "ground" myself in the dream (i.e., make it as lucid as it can be) instead of immediately racing to do something before I lose lucidity.

One of the tricks I use to "ground" myself is to "touch" things. By touching.. I mean really "feeling" them. Get into how they feel.. are they hot, cold, smooth, rough, etc. (this also increases the vividness of the dream along with helping me remain in it longer).

Just remember that "the deeper the level of lucidity.. the better your lucid experience should be".