I just want to check that there will not be too much climbing or steep steps during the tours?

In Huangshan, you will need to walk some steps after getting off the cable car. If you stay in Beihai hotel, the road from the cable car spot to the hotel is relatively flat and easy for walk. If you need, there are also sedan chairs available after you get off the cable car. You can pay for a sedan chair heading to the hotel.