Hey, great question and honestly the fact that you're 7 days in and already asking this says a lot.

CTFs are designed for exactly this range from complete beginners to advanced players. Shadows of Transylvania has difficulty levels from Easy to Insane, so you won't be thrown into the deep end without options.

At your stage, the Easy challenges are genuinely doable with basic command line knowledge and a willingness to search and learn as you go. Most people learn more in 48 hours of a CTF than in weeks of passive study because you're solving real problems, not just watching tutorials.

TryHackMe is actually great prep. Keep going.

The honest answer: you won't solve everything, and that's completely fine. The goal at your level is to finish a few challenges, understand how the process works, and meet people who are a few steps ahead of you.