You have lots of choices on which list to use. 

Please pick the one that will make you a better speller.  

Also, add words to your lists when you want to spell a word and don't know how, yet - those are perfect words for you!

Fry's first 100 words

"Purple sheet" words

Multisyllabic words

Scripps Spelling Bee words

Or, you could try a spelling program, here at https://www.k12reader.com/second-grade-spelling-words/

Here are some of the things we used in class to organize weekly spelling:

Spelling List

Spelling Test

Fix-it sheet (if you're having trouble spelling a word - extra practice)