Yea buddy thats good. Snakes are great. They generally eat bugs and mice and birds, Not plants you should be good to grow :). That said if your in USA or in a different part of the world than NA mind its not toxic thatd be brutal to try and harvest just to be bitten by a poisonous snake. Looks like a simple garter snake to me though
Yes neem oil! And fast! Those fuckers will eat your entire plant! Also don't forget to add the blood of mouse and leg of frog to your spray. Clear that pesky problem right away!