Its my first time to travel abroad

And im going to fukuoka im not fluent in nihongo what shoul i do?

A ton of tips on YouTube, basic Japanese phrases, travelers vlog and more.
Also jump to Reddit, Japan Trips & Travel Tips page and thread.
4 chan users know Japanese well, /ja/, #DJT = Daily Japanese Thread.

Use translate apps, cellphone SIM, or rent a mobile wi-fi router.
https://www.fukuoka-airport.jp/english/lanservice_net_mobile_rental.ht...
https://www.fukuoka-airport.jp/english/bank_edy_insurance.html

Get free EN guide book/maps(brochure, pamphlet) at tourist info counter.
https://yokanavi.com/en/tourist-information/

How many manners did you know?
https://yokanavi.com/en/sightseeing-manners/
https://yokanavi.com/assets/themes/yokanavi/mp4/manners_en.mp4

Of course, there is no problem if you post a lot here.

Most visitors do barely speak a word of Japanese. If only those who spoke Japanese would go to Japan, there would be nearly no international tourism.

Enjoy your trip to Kyushu!

Enjoy.
You will be fine. Fukuoka is a lovely place and does see a lot of tourists with limited Japanese.

Thank you guys are they friendly ? In fukuoka im nervous hehehe

Japanese are accommodating and many speak English. Most signage around Japan is in English also. You'll have no problems in Fukuoka.

Hello likebike Im travelling alone thats why Im worried 😔

In most tourist places there will be signage in English. It is unlikely you will venture too far from the usual spots and end up in one of the many locations without any English - there are many many locations like that, but you won't be heading there.

Thanks for the tips one more thing how to yanagawa river from higashi-hei station?