the design thinking process is much like the scientific method it is a 5 step process and i will tell you about each of them.
Step 1: empathize think of a problem with you or ask other people what there problems are be sure to write down notes and focus on specific situations
Step 2: define the problem now that you have done step 1 take your notes and look through them underline stuff like what do they have trouble with or what do they like to do because sometimes the problem isn't what it may seems after this create a problem statement which is writing the main problem.
Step 3: form a solution in this step you think of ways to fix the problem the people are facing the point of this step is not to get a prefect solution but to create many solutions for the problem sometimes you might want to draw what this may look like and show it to the people your trying to help.
Step 4: prototype build a real life model even try to connect with other solutions to see if it works better this step might take a couple try supplies and money are going to be need for this step.
Step 5: test have people in the real world see what problems they have with it and whats good with it always have a open mind and don't defend your product after this go back to form a solution and fix it and try again.