こんにちは！(sorry for my japanese) --> Please don't be sorry! Everyone was beginner, right? 

私の名前はセレステです。私は英語を話します。私は日本語を勉強していますする。

(can someone give me tips on learning Japanese and maybe correct my entry? ありがとうございます。）

*Saying "thank you" here wouldn't sound natural in Japanese. Generally we say よろしくおねがいします after we ask someone to do something. 

Good job! Please enjoy learning. There are many websites to learn Japanese. I hope you find some which you like. If you want to know some, please let me know. I hope this helps you. ¡Mucha suerte!

こんにちは！(sorry for my japanese)

私の名前はセレステです。私は英語を話します。私は日本語を勉強してる。

(can someone give me tips on learning Japanese and maybe correct my entry? ありがとうございます。）

Learn more grammar, more vocabulary, more kanji :) haah