Toss location will prolly fix most of your problems. Toss more to the left would be my first guess.
If you want to use the same toss, you need to slightly alter your swingpath. This is really nuanced, and if you can't tell you're adding slice right now, then it'll be hard for you to change your swingpath. I mean, you can try, but you won't recognize when you're doing it right or wrong.
There will prolly be some slice in your topspin serve. Unless you use more extreme technique to get rid of slice. You could have a proper top serve and slice serve, but your top serve could be someone else's slice serve.
Secondary guesses would be stay more sideways and arche your back and make sure your chest faces towards the sky.