Today, I was delighted to learning have a new English lesson and a new Spanish lesson.

After the main verb in the sentence, we use either the infinitive form (beginning with "to" + verb) of the next verb or the gerund form (ending in "ing"), depending on several factors (sometimes both are correct, but most of the time only one way is correct). So, in this case, it would need to be "to learn". However, it sounds more natural to say that you "have" or "take" a lesson if it relates to a specific subject (we can say that we "learn a lesson" if it is a general, life lesson). You can say that you took/had a lesson, and then you can say what you learned from the lesson.

I hope to show to my best friend Colombian.

Hmm... I'm not exactly sure what you mean here, so I can't make an appropriate correction. Do you mean that you want to show your Colombian friend what you've learned in the languages? If so, you can say, "I hope to show my best friend, who is Colombian, what I've learned." Most of the time you can stack adjectives (like "my favorite old movie" or "my funny best friend"), but not in the case of "best" and an ethnicity (like Colombian, American, Italian, Chinese, etc).

Hi again! I am so happy. You understand me. My friend Colombian, it means a lot...He speaks two languages. I want to improve with both languages, because he will be visiting me in next year. Thank you.

Hi! First of all, I want to say. Thank you for your efforts. You are really explain a good way. In my sentence."Today, I was delighted to learning have a new English lesson and a new Spanish lesson." In my mind, it means; I learn tow languages from a YouTube by a best Youtubers. That's way. I specifeclly said" I was delighted to learn a new English lesson..." I hope you're understand me. I always write a simple. Thank you.

I see what you mean. I only changed "learn" to "have" because it sounds more natural this way. When speaking about specific subject that you learn (math, English, geography, computer programming, etc), we often say either that we "take" a lesson or that we "have" a lesson. For general things that we learn through life and our experiences, then we can say we "learn" a lesson. For example, in your case, you said that these lessons were taught by youtubers online, so to describe this, you could say, "I watched a new English and Spanish lesson on youtube today. I learned about.... (whatever concept/new thing that you learned)." In this situation, we wouldn't usually say that we "learn" the lesson. The exception as I mentioned above is when speaking about general life lessons. For example, if a child lies to their parents about something, and then faces many consequences for that lie, afterwards they might say, "I learned my lesson not to tell lies." Or maybe someone loses a lot of money to a scammer online, then they might say, "I learned my lesson not to blindly trust people online." I hope that clarifies my suggestion. Let me know if something is still unclear.

I see what you mean. I only changed "learn" to "have" because it sounds more natural this way. When speaking about specific subject that you learn (math, English, geography, computer programming, etc), we often say either that we "take" a lesson or that we "have" a lesson. For general things that we learn through life and our experiences, then we can say we "learn" a lesson. For example, in your case, you said that these lessons were taught by youtubers online, so to describe this, you could say, "I watched a new English and Spanish lesson on youtube today. I learned about.... (whatever concept/new thing that you learned)." In this situation, we wouldn't usually say that we "learn" the lesson. The exception as I mentioned above is when speaking about general life lessons. For example, if a child lies to their parents about something, and then faces many consequences for that lie, afterwards they might say, "I learned my lesson not to tell lies." Or maybe someone loses a lot of money to a scammer online, then they might say, "I learned my lesson not to blindly trust people online." I hope that clarifies my suggestion. Let me know if something is still unclear.