I visit on the ShibaDoge website. It seems, you can use Uniswap to buy and sell ShibaDoge but I remind you that the gas fee will be bigger so you need to have enough ETH for the gas fee...
Considering the fact that the ShibeDoge coin is placed on the http exchange
https://www.hotbit.io/exchange?symbol=SHIBDOGE_NUSD, you can buy it there. In this case, you will not have to pay high commissions in the Ethereum network on Uniswap. But I still have doubts about the correctness of choosing an OP coin for investment.