It is good that you have domain with your targeted keywords.
It may help your in ranking for that domain keyword. BUT having keywords in the domain isn't the only thing you need to rank your site. There are still many other factors on which you need to work hard.
So If you want to rank your site. Do work hard on both On Page SEO and OFF Page SEO of your site.
Having the keyword in your domain name will help your website visitors much to remember your domain easily in search engines. Ranking will always depend on the keywords chosen and the competition they have in search engines. Your domain name specifically won't help boost your ranking in Google.
It can be valuable to make a brand of your own and build a site around a brand rather than a keyword. What if you lose ranking for a particular keyword term? Or what if your site outgrows certain narrow-keyword choices you made early on?
Yes it matters. Your visitors search about issue related with your domain name. So they will remember much more about you, and this means you will get direct hits in the future.