Convert Bluetooth code to BLE

Hi everyone,
I purchased a LOLIN WEMOS C3 mini thinking I could try this tutorial with it:
Create your own App! Control an ESP32 (Arduino) via Bluetooth - Part 1

The tutorial takes the viewer through using a pre-written Bluetooth sketch and the MIT App Inventor to illuminate 3 LEDs using buttons on the app.

Once I got the C3 mini and tried it I learned that it does not support the same type of Bluetooth, as it needs BLE. I'm wondering if anyone knows if it is possible to change the Bluetooth code into BLE? I'm very new to playing with any kind of Bluetooth or app.

I would like first of all to figure out how to create a BLE code and Android App that would allow me to push buttons and illuminate LEDs. I think once I can get that far I will be able to figure out the rest.

My project started with a D1 mini + RGB LED shield. I have been able to get it to do the light show I would like (using various methods... delay, milis, machine state). However it is limited to only having 1 light show unless I add hardware buttons and I don't want that for the project (it is inside a small light). I did play around with the WIFI feature but wasn't satisfied with how it would work (complicated to get connected, for example). So I would like to create a bluetooth app which I can choose the light show from. Hence the ESP32 (which I went with C3 mini has it as the same form factor as D1 mini and is compatible with the shields). I'm not looking to change the C3 mini, I'm looking to find a way to send commands from a bluetooth app to the C3 mini.

For the app, I was thinking MIT App Inventor since that is what he uses in the tutorial. I checked and it does appear to support BLE.

Does anyone have any suggestions? Is there a way to convert a Bluetooth code to BLE? Any alternatives? Has anyone seen an example code similar somewhere?

Thank you for any guidance you can provide!

(Edit 1 - spelling, Edit 2 - added details)

quick update: I was able to find a sketch from an example under ArduinoBLE library.
Thanks everyone :slight_smile: