The first sentence sounds awkward. The second sentence sounds better. You could also say: “I will go also,” or “I’ll go too.”

I agree with Travis and Elizabeth Decker's comments :) The second one is correct.

I agree with the previous comment. The only two ways the first sentence would seem correct would be to place the word “also” at the very beginning of the sentence with a comma or, better yet, to move it to the very end of the sentence. I hope that helps a bit! Please let me know if it doesn’t!

Both technically are correct but will also sounds more fluent

The second one