[Question] What’s the best way for me to improve my English pronounciation?

I’m a na­tive Ger­man speaker and learned a good por­tion of my English not in school but by read­ing English con­tent.

As part of a New Years event we did a Doom Cir­cle and one es­sen­tial feed­back I got was that I have to im­prove my English ac­cent.

When it comes to my bud­get I’m will­ing to in­vest a few hun­dred Euro but not thou­sands.

What would you recom­mend to me to im­prove my English pro­noun­ci­a­tion?