I know I need a radiator flush... I know the Thermostat may be messed up, however, how should I do these things, and grrrr... is there anything else I may need to look at?

This link should help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-3.html#post235973