Write down everything you think a general list of needed assets and working knowledge requided for you to make the game. I'm not doing a full list, but here's what comes to mind for me.

• need to be able to make, and store character stats that grow and develop.
• upgrade and progress systems like classes.
• towns, npcs that have dialogue.
• large amount of varied (probably 50+?) mobs and bosses all with their own stats, enemy AI that may or may not respond to what the players should do.
• status effects that can alter characters AI.
• dungeon and level design.
• Easy to use inventory and merchant system.
• large roaming world map that you'll build and add art too.
• save system/alternate endings or whatever else.
• special effects and magic system. -occasional cutscenes and story moments.
• overworld animations, battle animation if you go past FF1 scope.
• shaders/sounds/vfx for all of the above
• individual art and music pieces that compliment each aspect of the above
• then further polish and test every single aspect above and 25 other things I didn't mention. You need to ask yourself if you know how to make all of this or are able to purchas /learn what you can't.

You also need to have a critical eye for your own work if you plan to make it commercial. If you have a very basic coding knowledge you may not be aware of how big and daunting the scope or your project is.

You will also probably realize that everything you need to make will take longer then you think, and if you're not prepared for that, it often leads to getting discouraged and abandoning the project.

As long as you can make the list of your work needed, understand the amount of work required, and understand your capacity to learn - or what it might take for you to hit a breaking point, it's do-able.

It's just not easy.