I been an eventful few years for HGTV star Tarek El Moussa. In 2016, the real estate investor went through a very difficult — and very public — split from his wife of seven years, Christina Anstead, with whom he shares Taylor, 9, and Brayden, 4. The divorced duo continued to film their hit show, Flip or Flop (the ninth season will air in August), and both moved on romantically: Christina and husband Ant Anstead welcomed a son in September, while Tarek, 38, has been happily dating 32-year-old Heather Rae Young (star of the Netflix reality series Selling Sunset) since last summer. And now, he’s venturing into new territory with his spinoff, Flipping 101 With Tarek El Moussa. “Sure, I had some jitters my first day filming solo,” he tells…