My first play mat was one of the Ultimate Guard basic land cycle. I got the forest one specifically:
Play Mat Magic The Gathering Series Forest Ultimate Guard https://www.amazon.com/dp/B01H5KIKGS/ref=cm_sw_r_cp_api_GjJXBbW75ST5Y
Has held up very well to this day after a lot of use. For the price point, it’s one of the best mat series out there IMO. There’s a design for each basic land type, so take a look at the others if green isn’t your thing ;)