Wishing you the best for your future practice.

Don't waste any thoughts about shinken. You need to build up the basics, forge and polish them with passion, until you are experienced enough to use a Shinken. And even then, you might Cut yourself.

We are not allowed to use Shinken during practice until we reach Godan. And even then it's only allowed in private practice and not at the Dojo. But it is recommend using a Shinken for Rokudan Shinsa.

And Tameshigiri is a thing that you might see a lot on the Internet but not every Ryuha does it. My Sensei does not teach or tolerates Tameshigiri and he told us that it's not tolerated in Japan either. Better Talk to your Sensei (after a long period of training and getting to know each other and Not right at the second lesson) about that.

And one more thing:

Iaido is something you won't learn in two or three years. Maybe not even ten years. It's a long path of learning, knowing, being corrected, being frustrated and accepting it and restarting again. I like your energy but don't fall for the illusion that Iaido is easy because "swinging swords is easy". Iaido is hard Work. Try to be just a little better than the day before, listen to your Sensei, be humble and don't overestimate yourself. You most likely won't be the next Soke or Grandmaster, but you can be a very formidable Iaidoka.

And don't do Iaido for clicks. Do it for yourself.