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Since I'm a newbie, I would have some advices about exchange with others Altcoin. I was thinking about exchanging my XDG for ETH. Is it worth? I should keep my Doge or exchange with other coins?
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How much is the total worth of Dogecoins which you found in your old wallet. Since the price of doge coin is low, even thousand of doge coin wont give you much amount in usd to buy a large quantity of ethereum. I will suggest that you buy Ada. Althogh the ada price is around 1.3$ but it can likely go to 3 -5 dollars in next few months if the market recovers.
actually, if you have found a wallet with XDG coins, that is hardly DOGE, since XDG is an exchange used symbol, so you cannot find that in your wallet
you could find those on Kraken exchange for example, but than you had actually found an exchange account, not old wallet
nevertheless, it is the best to use your own analysis and try what to buy for that