You need to specify a primary field and genre, preferably one in which you hold some demonstrable knowledge. Magazines sell to specific markets and their writers usually reflect their intended audience. For example, I wrote for a fishing magazine for many years. I was also a regional "pro" who actively participated in the magazine's industry. If you want to be taken seriously by any magazine editor, you'd better be able to offer something special to "his/her" market.
Try this place. It's got listings for pretty much any kind of fiction magazine you'd want to write for. Duotrope's Digest