Welcome to the beauty forum @hannafoster, we’re glad to have you onboard 
For a super quick fix, I would suggest a mayonnaise hair mask 2-3 times a week. Massage half a cup of mayonnaise into the scalp and make sure to spread all through to the ends. Place a shower cap on your head to avoid any messes and let it sit for at least 30 minutes. Rinse out and follow up with equal parts apple cider vinegar and water.
A hot oil treatment also works really well! You can use coconut oil, avocado oil, or even olive oil. Just heat it up in the microwave for a few seconds and apply to ends. Works really well at softening rough hair and moisturizing dry ends.