My understanding is that choosing the 'VoxeLibre' (formerly 'MineClone2') game will get you the most MineCraft-like experience available on the 'MineTest' engine.
If you're going to play on the device that serves the game, choose the 'Host' tab after choosing 'VoxelLibre/MineClone2', create a world, choose a username, and press 'Host Game'.
You'll need to do a little research to figure out what your Samsung devices IP addresses are.
There's an internal IP for friends playing with you on the same WiFi, and an external IP for friends across the Internet.
To play on the same WIFI, just give your friends the internal IP. Have them press Register and then Login.
To play with friends outside your local WIFI, you'll need to also pinhole port 30000 to your device, using your router configuration.
Note that this is exactly the same IP situation as with Minecraft Java edition. So you can follow any guide that works for Java Minecraft and it will work for MineTest. The only difference is that the MineTest port is always 30000, unless you change it.
Maybe it's best to give your ISP a call to see what are your options. Here in Croatia port forwarding won't work until you call them and tell them you want it, then they enable it.
You can then also ask them how to access your router. But usually you find your router's IP in your WiFi settings, enter that IP in your browser, and the password is usually printed on the bottom of the router. But check with your ISP.
If they say you can port forward, it means they've given you a unique public IP. That IP can be either static or dynamic. Both will work, it's just that the dynamic one will sometimes change and you'd have to send your friends the new one. You can always check your public IP by googling "what's my ip".
If you get a dynamic one and it changes too often for your convenience, there's a thing called "dynamic DNS" or DDNS. noip.com is a popular DDNS provider. It works by having an app that checks your IP every few minutes and sends it to noip. They issue you a host name, for example "mygreatservername.ddns.net" which always points to your current IP, and you give your friends that hostname.
This might be a bit overwhelming, so keep us updated with your progress and we'll help along the way.
Sometimes the info to get to your router's settings is written on the bottom of the physical router itself.
For example, you might find a sticker saying it's default local IP is 192.168.0.1, it's default username is "Admin", & it's default password is "Admin123". In that case on a computer connected to your WiFi you could navigate to https://192.168.0.1 in a browser and provide those credentials when prompted. Afterward you can access router settings including port forwarding.
If you don't find that info on the bottom of the router you can check its user manual (if you have it). Or you can often look up those defaults by searching for your router's model number on the internet.
If you don't get a static IP, you'll need to look up your external IP and share it with your friends every time it changes.
I've had home networks where the external IP only changed once every year or two.
Technically, your external IP could change every hour or so. Realistically, the way DNS works, it's unlikely to change more than every three days. But I've never seen my external IP change anywhere near that often. Could be I've just been lucky.
If you find that your IP is changing so often that is a pain, you can either get a static IP (expensive) or set up Dynamic DNS services (much cheaper) as a workaround.
I've always landed at "not actually dynamic DNS", where I create a public DNS record for my external IP, and I just change it by hand about once per year when I notice it has changed. I pay about $2 US per month for DNS services, plus about $15 per year for a domain name.
Just a quick add, when you're playing on the same WiFi network as your friends, you don't need any of the external IP stuff in this thread.
So playing on the same WIFI network could be a good way to see how you like the gameplay, before going into hardcore gamer networking to get remote play working.
Of course, everything discussed here works for a ton of games. So it can be well worth the effort to figure out, if you find the time.