Yes these are correct. To force somebody or something means using force to make them do something. To enforce something - usually a law or other rule - means making sure that that law or rule is obeyed. Enforcement may or may not require the use of force - it depends on the rule, and on how obedient the people are. I wouldn't typically say that I had enforced a plan - a plan isn't a law or rule - I would say I have carried it out: your sentence would read better with this.

You used both words correctly. Well done!