Combining workout days

Hallo everyone šŸ¤—šŸ¤—

I need your options and ideas.

I like to do some individual workouts beside FB Programs( cycling, running).

At the same time I want to get benefit of the programs as much as I can.

My plan is to combine days. For example doing core day and upper body day or lower body day and upper body day in one session.

Currently I am following FB blend. I want to combine main workouts.

Does this rush make sense? Does anybody combines days here? Or should just complete workout week in a different pace ( one and half week)? I am little bit obsessed with completing week as planned. Maybe I am just overthinking about this. I cannot make up my mind.

Thanks in advance for your comments. Plus sorry for bothering you with my broken English.

Looking forward to hearing from you.