It's frustrating in the bit when they really want to crawl but can't yet. Once she can crawl, she'll probably be entertained just going around different bits of the house (and you'll be chasing after her finding out what you haven't yet babyproofed :o)
Playing with her for 10 minutes at a time is fine. You don't need to play for hours. And it's good to let her entertain herself a bit too. Have you heard of Treasure Boxes? That's quite a good game where you get a small box/basket about the size of a shoe box, and fill it with random things from the house which are not toys but she isn't likely to hurt herself with and just sit her next to it and let her explore the different items. Things like a wooden spoon, a bath scrunchie, a sponge, an empty bottle, a whole apple, unpeeled orange, a hairbrush, a clean sock. DS2 is currently fascinated with a fly swatter he found lying around somewhere, and any discarded spoons he finds lying around the place. The idea of the treasure box is that you don't get directly involved, but just observe from a distance in case anything breaks or becomes dangerous somehow.
In this weather if you have any outdoor space water play is good, paddling pools are really cheap to buy and easy to set up and put away when you've finished with it.
If you do want ideas of things to do with her directly, nursery rhymes with actions are great for this age, look on youtube if you have forgotten them, or look for a book of nursery rhymes. Also starting to read board books (I used to go on trips to the charity shops/library to get new ones) especially anything with textures, holes or flaps. Rolling a ball or balloon to her is fun, also blowing bubbles for her to catch. Building towers for her to knock down is good - if you don't have anything to build I recommend a set of stacking cups, wooden blocks or mega bloks as these all have long lasting play value. Any little cups, pots or bowls are great for a game of putting things in for her to take out, or hiding items under for her to find, and peepo under a muslin or blanket. Toys with really irritating songs and lights seem to really captivate them as well.
Do you have any friends with similar aged babies you could have a coffee/playdate with?