These are some basic security tools you should consider.

Operating system: Tails

Network equipment firmware: OpenWRT

Password manager: KeepassXC

Web browser: Librewolf

Addons for Librewolf:

Privacy enhanced web browser: Tor Browser Bundle

Network ad blocking: Pi-Hole

VPN: Wireguard

Disk and volume encryption: Veracrypt

Adblocking and privacy enhancement for Android: DNSnet