How can you use somebody else’s pictures and use them to flog your services?
It could well be that I’ve misunderstood your intention, but if you are just a “budding” aka novice landscape photographer, how do you square offering a service that would reasonably assume existing expertise on your part as its validity, with admitting you don’t already posses that expected level of experience?
I suggest you’re putting carts before horses and need to give this a little more thought?