This is an interesting topic to explore -- I've been exploring this for a few decades now.
Rather than trying to confine yourself to a particular ideological foody-label, I would suggest that you think about how you would answer several questions, and, over time, find an approach to eating that suits you.
Yes, humans need protein, but there are several ways to get enough. One can get animal protein from meats, of course, and here one can choose from red meats (beef, lamb, pork) and white meats (usually poultry like chicken or turkey). Both are fine. Nowadays I use small quantities of meat mixed in with lots of veggies.
Eggs provide excellent protein, as does milk and cheese. Lacto-ovo vegetarians dont eat meat, but do eat eggs and/or milk products.
Folks who would rather not eat any animal products can get plenty of good quality protein from vegetable sources. Since vegetables are usually incomplete proteins, there are ways to combine foods so that all the necessary amino acids are available for the body to use. This usually means combining beans with complex grains, or beans with seeds or nuts. Examples might be: refried beans with corn tortillas, lentil soup with toasted seeds on a salad, peanut butter on whole grain toast. Nowadays the nutritional "wisdom" is that you don't actually have to consume these combinations in the same meal in order for the amino acids to complement each other, you just need to consume a variety over the course of a day.
I am not fond of soy beans either. There are lots of other legumes (beans) that are tastier and just as nutritious.
As for calcium, there are lots of veggies that have calcium, and if you are concerned that you aren't getting enough, you can use calcium-fortified orange juice or take a supplement. I have heard from some sources that people who don't eat any animal products need less calcium than those who do eat animal products. I don't know if this is true or not.
So, questions for you as you explore some changes to your diet:
Would you miss meat if you gave it up entirely? Would you be ok with only white meat? Would you be ok with using only small quantities of meat in dishes with lots of veggies and a tasty sauce? Would you like to experiment with learning to cook more vegetarian dishes? Would you miss eggs and/or milk and/or cheese if you gave them up entirely, or would you be willing to try eating less of them?
As for vegetarian dishes being boring, you only need to look at the cooking of other cultures to know that there are lots of ways to perk up plain foods. There are tasty veggies to mix in with the grains and beans and lentils. There are lots of spices and herbs and sauces that liven things up.
Would you be interested in taking a cooking class or two to learn more about cooking vegetarian? If you decide to look for a cookbook or two, I would recommend getting ethnic cookbooks, so that you can learn what other cultures do to perk up their dishes.
So -- what is important to you? Some people make their decisions entirely on ideology, and some make decisions for health reasons, and some for a mixture of reasons. Regardless of what you decide, you can make this culinary exploration a fun journey!