I'm am not sure what specific subject you are interested with but I would like to assume it is about cryptocurrency and blockchain technology. So aside from reading books on these subjects, you could try some tips listed below with the hope that it could help you grow in this field of endeavor.
1. Try to read Beginners & Help section first -
https://bitcointalk.org/index.php?board=39.0 as it offers the most comprehensive and useful information on anything about cryptocurrencies especially for newbies who are really interested to learn about the subject.
2. Browse relevant threads on this forum and participate in exchanging of ideas with fellow forum members as it also offers tons of important information typically not found in books.
3. Read white papers of different crypto projects to better understand the different concepts and use-cases of blockchain technology.
4. Join different social media channels of each respective project and ask queries relevant to the project whenever necessary.
5. Read cryptocurrency news from different crypto related sites and bloggers.
6. Learn from hands on experience especially on trading strategies and other technical stuff related to cryptocurrency.
7. Do your own research on topics that you are interested whenever possible as everyday is a learning experience and learn and grow from it.