Protect PC from High-End Attacks?

Hello! I was wondering if anyone could give me better tips to protect my PC from things like botnets.

In the case I am particularly looking to expand my security horizon not on accidentally visiting websites that would give me a botnet, but people deliberately attempting to botnet or backend my PC through their own custom tools.

I was also wondering how I could help make Discord far more secure than it is because it uses WebRTC, which isn't secure,if there's any way to make it more secure on my PC.

I have ZoneAlarm firewall and, by default, Windows firewall is on, but I am looking for something stronger that won't give in when people overwhelm it/use powerful cutting-edge tools to bruteforce. In general, I would also appreciate tips, as a site I visited no longer offers its PDF on Windows security and most tips online are pretty garbage, like "well, do you have a password? How about a good antivirus?"

Thanks guys! :)

Hi, I like Secureage SecureAplus, which provides
- application whitelisting (preventing things running that have not already been approved down to dll level)
- normally non-intrusive
- not a noticeable load on the system
- multi-engine scan
- runs alongside conventional AVs - I use Avast free.
- competent responsive support.

Data Security Solutions without Compromise | SecureAge Technology
Free Cloud Antivirus Application Control for PC | SecureAPlus

SecureAPlus uses cloud antivirus engines to provide the most accurate diagnosis to detect potential threats – effectively giving a second opinion with 12 antivirus engines without slowing down your PC

By getting the choice to run or block every time an untrusted application launches for the first time, you are effectively given a reliable way and probably the best virus protection and malware protection against freshly created threats.

This is especially effective on Advanced Persistent Threats (APT) which most traditional anti virus protection software struggle against.

====================================
Ransomware:
In addition I have
Cybereason Ransomfree
Bitdefender Antiransomware

All are free; no conflicts, no system slow-down.