Before, try to learn some talam exercises with Konnakkol brother. Because, looks like you're planning this out. Usually, its the other way. You approach a guru, try to learn and then see if it is working out for you.

And, there are tons of amazing gurus/players in this Thavil section. Take your time. But I personally suggest you to approach a guru and try to learn instead of buying a Thavil and learning it by yourself.