Hi there! You could try squash, carrot, apple, banana (however this is constipating so if you are worried about it maybe avoid for now), avocado, blueberry, sweet potato, beans. Most single fruits and veggies are fine.
The recommendations for starting meats can vary depending on where you are from. I would usually say it's ok to go ahead and start them early. Since you think some foods might upset your LOs tummy, maybe go slowly and work your way through some of the fruits and veggies, and then start adding meats in a little bit.
I know that starting solids can seem overwhelming with all the different advice that is given, but actually you can introduce most foods quite early and easily. The best thing to do is keep a food log and introduce foods slowly, so you can try to determine if a certain food causes any problems.
HTH