Wizer is offering free security training. Their videos are only a few minutes long and in an entertaining hand-drawn style. The site will also keep score if you need that for your business records.
Infosecinstitute.com/learn lots of videos
Professer Messer CompTia A+ network + security+ Home – Professor Messer IT Certification Training – CompTIA A+, Network+, Security+
Linux for hackers https://linuxjourney.com/
Code Academy https://www.codecademy.com/
Team Treehouse https://teamtreehouse.com/
fcc https://www.freecodecamp.org/
TCM security training and certs https://certifications.tcm-sec.com/
try hack me hands-on learning https://tryhackme.com/
hack the box prove your skills https://app.hackthebox.eu/login
Vuln hub; test your hacking skills https://www.vulnhub.com/
Capture the Flag hacking challenges https://ctftime.org/
Pentest Academy https://www.pentesteracademy.com/onlinelabs