I've done pretty much this same route, but in reverse! You picked a good one and described it well. Also the food options along the way are so good.

As for another walk recommendation: start at the top of van Cortlandt park, walk south through it then along Mosholu parkway. You'll reach the NY Botanical gardens/Thain Family forest (good time for a stop on Arthur ave for amazing food), keep walking south until the Pelham parkway. Go east along Mosholu-Pelham Greenway all the way to Pelham Bay park. Lots of seafood options in City Island. Great views everywhere. Total trip of ~8 miles.

Pretty straight forward looking at google maps but reach out if you need any guidance (or food recs!). Have fun out there!