Where I can relearn my language

Hey! Sooo.. I was born in Dar TZ to a Kenyan father (Luo) and Tanzanian mother(mwera).

My mom, sisters, and I came to the US in 07 when I was 6. Haven’t been back home since & unfortunately been Americanized and forgot to speak Swahili (i speak broken Swahili) though I can understand and read it. Are there are websites/apps that can help me to relearn my language.

I want to visit home next year, and be able to hold an actual convo w my some of family that don’t speak English well, both in Kenya and Tanzania!

TIA