Speaking another language on Youtube

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I need advice. I was thinking about the languages I say I speak and questioning myself about what would happen if I tried to open a language channel on Youtube.

I want to boost my ego a little and become hyperpolyglot. Long road to go, but it should be done. I think my abilities to learn new languages have been neutralized by years of pleasant solitude and laziness.

But I have been progressing in these languages, among others:

French
Italian
German
Portuguese
English

Which language should I use first? Any advice on how should I portray myself? Any hints on how should I do it?

Thanks

Speaking another language on Youtube | Ecency