Student or Learner
As a non-English native, it is difficult for me to diffentiate between them.
Could you please give me a helping hand?
I know it's not much of a present but I made it myself.
I know it's not much of a present but I made it by myself /on my own.
Thank you very much indeed.
There is not much of a difference.
I made it myself -- this is personal, I was the one who did it, I made the choices, did the labor, etc.
I made it by myself -- no one helped me.
There is a lot of overlap.
A child who gives you something an adult helped with might say the first, while an effort that was entirely without adult assistance might lead to the second.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.