Looking for a new mic and interface

Hi all, im looking for a new mic and audio interface. Im coming from using a Blue Yeti usb and it just sounds muddy and kind of awful, ive tried eqing it and changing its settings but it still sounds like shit. I also play guitar and used to write music back when i was in school and had access to equipment and would like to start doing it again.

So far ive gotten myself down to a few options.

Microphone wise, im debating between the Rode podmic, the fif k688 and the k669d. I'm having a bit of trouble deciding between them and would like to hear others thoughts.

Interface wise I'm liking the look of the fif sc1, i know the focusrite scarlett is largely considered the go to (as it should be) but I feel like the sc1 largely provides everything I need and going for something double the price feels unneccesary but again i want to hear others thoughts.

My overall budget is around £100 but i do have some wiggle room. Thanks for anyone able to help.