How to buy glmr with dot?

Could you please elaborate on the process of acquiring GLMR tokens using DOT as the mode of payment? Is there a specific platform or exchange that supports this transaction? What are the steps involved, from initiating the trade to confirming the receipt of GLMR tokens in my wallet? Additionally, are there any fees associated with this transaction, and how can I minimize them? Lastly, what are the potential risks and considerations I should be aware of before proceeding with this purchase?