The strike price is determined by the seller, but all you should worry about is what you think that price will be. I chose $105 by January 2024 because I knew I would be in the money (ITM) quickly. The penalty for that is a higher premium (what you pay for the option up front). The premium is determined by other factors too.

A leap option just means a long term call option. There's generally less risk and more upside to a leap, but you're paying a higher premium.

A warning about options: It's high risk. I've lost a lot of money being too confident a stock would hit a certain price by a certain date. All indicators and charts can tell you it's a safe play, and the stock will still do something unexpected. It's good to diversify options instead of go all in on one. Though DWAC is a safer play than most.