I'm looking through your first game, and I don't know if this line works but it looks like it does. Could you analyze it to see if there was anything I missed here?
The position is definitely very interesting. If I weren't an Indian Defense main against d4, I would definitely play Noteboom/Semi-Slav positions.
I found out that IM Sielecki made another course but for Black and found this really interesting 4…a6 move. The play after 5.Bg5 reminded me a lot of the Botvinnik Variation in the Semi-Slav. Although my game was not perfect, it was a very dynamic and fun opening to play
As a reference, here is the Botvinnik Variation