While some scripts are very specific, it’s not necessarily something you should memorize word-for-word (as a pro actor of 10+ years myself, I’d say about 90% of my projects changed the script to some degree while on set). Find the most relatable way to say your lines, the same way you’d speak to a friend. In fact, practice your lines in front of a friend, a mirror, or record yourself to see how you come across. The more yourself you can be, the better.
Naturally, you want to look good on camera. But, most importantly, you want to feel good. Choose clothing that not only looks flattering on you but also makes you feel confident and comfortable. Here are some other tips to help with this:
Rule of thumb, keep it natural. It’s easier to add more than to take away. Some sets may provide a makeup artist but don’t count on it. Always come prepared, bringing your own makeup for touch-ups. And if you’re not wearing makeup, bring powder and/or a towel (at the least) to help minimize any perspiration/shine you may have while on camera.
Remember, be the rockstar you already are. Sincerity delivers (and sells) best. And with these tips, you can be more confident you’ll achieve that.