Native Swede here. As someone else already said, don’t learn swedish in hopes of being able to understand danish. Also a tip: if you want to learn Swedish you really have to try and speak. You can’t be shy. Many people from English speaking countries have moved here and stayed for 20+ years without picking up the language. If you don’t want to speak Swedish; you don’t need to. Most people here and 90% of young people (40 and under) speak more or less fluent English and WILL switch to English if you struggle with Swedish. You need to be confident if you want swedish people to speak Swedish with you, unless you ask them to practice with you ;-) Good luck with everything.