I also picked up Python shortly thereafter for my education, and I found that Python has little things about the language that differentiate it from JS, and help me remember the different (e.g. no declaration keywords, no curly braces, different function keyword).
The biggest thing is honestly just practice. Building things and completing challenges using the languages you're learning, which force you to abide by its rules and remember its syntax. I find that learning in-situ like that is much more effective.
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