helix native Confused about hooking up components

[m6255]

Hello, I just purchased Helix native. But that’s after this summer purchasing a used pod HD500x and 2 DT 50 amps one head and a 212. I’m retired living on a fixed income for now so I can’t afford a helix fit now but I took advantage of Sweetwater’s half off sale for the helix Native for 199.00 couldent turn that down plus got my buddy who prior was anti line 6 or digital anything. Anyway here’s what I’d like to do . Record into the Logic daw then the helix as AU in fx. Currently I have 2 audio interfaces my old old x3 pro and my newer HD500x. I’d like to use the HD500x and be able to plug my Variax Standard which I’m also fond of rout that signal with no coloring from the hd500, then be able to plug back into my twin DT 50s using the L6 Link of the HD500x so I can hear the helix sound through my DT 50s. I can’t find any instructional video regarding that setup. Basically I want to replace the sounds of the HD500x with the helix native but keep the dt50 setup. On top of that using the MIDI setup in the HD500x not the usb control helix native with my DT 500x. I fear I’ve made things too complicated. Any suggestions would be greatly appreciated. I know this says I’m just starting out but I’ve owned every Variax including a few basses, every pod, 2 vettas and the one before the vetta, getting old lol memories goin. Lol. Appreciate any suggestions while I experiment on my own thanks , Mark