I posted on a similar vein a short while back
I’ve done my DELF qualification, but never finished the DALF. Which has never really mattered in day to day life except occasionally when a french friend of ours who is a French teacher looks tortured the latest horror I have inflicted on the French language.
Anyway, I thought I would try to iron out the glitches. So I have started an online course that I’m finding amusing so far. Based on animation and maybe 20 minutes a day. Goes up to C1 level so covers quite a lot of the basics.
You can get a free trial. If you use this link and anyone goes on to subscribe I’ll get a couple of weeks free.
https://www.frantastique.com/r/referral/C45KPHB
And feeling very proud of myself that I’ve kept it up and I’ve not missed a day since! Others have also added other options that they find useful & fun