We have a postage stamp front "yard"... smaller than our living room I'd say, lol.... and we moved in last summer and it had a lot of crab grass towards the end of the season.....well, now that everything's starting to turn green, etc., the spots where it was crab grass are now dark green with little white flowers..... I think they're going to turn into dandelions - ugh.... lol.... sooooooooo, I don't really know what to do. Would putting sod down be expensive? Would that kill whatever fungus/weeds are growing? Or would it just be a temporary fix? What should I be doing now in terms of spring maintenance and prevention?

TIA! :)