Logic says that if you want to be a 'landscaper', then you should get some experience first by either taking a course if one is available in your area, or by going to work for a reputable landscaping firm for at least a year. If your goal is garden maintenance, which is not even remotely connected to landscaping, then some of the suggestions you have received are worth considering. But, please, don't confuse garden maintenance with landscaping. They are two different industries.