Welcome Ken!
As far as conditioning goes I would say just do ANYTHING that gets you hating life. Intervals on the elliptical, bike sprints, treadmill sprints, even complexes using some very light weight. Whatever you have available, just do it HARD.
THIS thread has some different conditioning challenges as well depending on what you have available.
@Alpha has a great youtube channel (Brian Alsruhe) that he has now posted 12 different “mindset challenges” that will not only challenge your cardio but your level of insanity.