The supply hoses on a clothes washer are a common planning item because they age quietly and fail without much warning. Replacing them is a task many households can do. Whether you should do it yourself depends on a few details of your own setup, not on general confidence.
Questions to answer before you decide
Can you close the water supply valves fully at the wall? Does each valve turn smoothly, or does it stick, drip, or stay partly open? Do the hose ends match the valve threads and the washer inlets? Is the old hose cracked, bulging, or stiff? Is there a drain route that will take a spill without damage? If any answer is unclear, that is your first signal to hire it out.
When to hire it out
Hire the work if the shutoff valve will not close fully, if it is seized, if it leaks at the stem, or if the wall behind the valve is damp or stained. Hire it out if the washer is built in and cannot be moved without special care, or if the fittings do not match and you are unsure which adapter fits. A licensed plumber or a qualified appliance technician can handle these conditions. This is a matter of which hand should do the work, not a judgment about you.
When doing it yourself is reasonable
If the valves close fully, the threads match, the old hose shows wear, and the area is easy to reach, you can usually do the swap yourself. Close the valves, place a towel and a bucket under the connections, unscrew the old hose slowly, and check the new hose for a snug fit before you open the water. Watch the connections for a few minutes after you restore the supply. Keep a note of the day you replaced each hose in the house file so the next check starts from a known point.
Where the washer fits in the plan
Hoses are a small part of the washer's service life, but a leak can cause damage well beyond the machine. Read the Clothes Washer guide for the planning window and the signs that the machine itself is nearing the end of its typical life. Replacing a hose does not reset the machine's age.