Whether you choose to go for certification or not, quality management is a great idea for all businesses.
Be right first time, every time. Make sure your products and services are fit for purpose.
Be top quality, and be consistent. These can get you new business, and improve your existing business.
I can offer advice about quality improvement, and maybe certification to the international standard. If you are already part way there, don’t stop at quality, go for excellence. Be the best and proud of it.