parenting is hard! Most people find playing with children this young boring and tiring. However, you act all jolly and happy, because you are laying the foundations for a life long relationship, which you will find more and more rewarding as years go by.
Variety! Go out a lot! don't hurry to places, but enjoy the journey, a slow walk to the park with lots of chat and dawdling, rather than a quick drive which gives you more time to kill when you are there.
Time goals - when you start to feel really drained by the play-doh, bouncy ball, whatever it is, give yourself 20 minutes more to pretend its the thing you most want to do in the whole world - lots of smiles, fake excitement, communication. Give your child a 5 minute warning before you have a break
Tea breaks - if you can get a decent cup of tea in Germany! - I would allow myself 3 or 4 in every full day of playing I did - and this meant I sat down with a cup of tea in my hand, and my child learnt that was mummy's sitting down time, and she would be playing again soon.
Do housework together. Ok, it will take 10x longer, but if you spend 30 minutes on a game called sorting the laundry, then you have amused your child for 30 minutes, and got some laundry sorted - two birds!
Play dates - much harder for a man to organise than a woman, sadly. But look into organised activities, eg baby music, baby gym, baby swimming, etc, again, you take time to go their slowly, you benefit from the company of other adults, and you take time to come back slowly too.
Above all, know that this gets easier.
Everyone finds some stages harder than others. My personal hatred is age 3- very independent, needs constant supervision, but has their own opinion on everything... this is the age I have found hardest with nieces and nephews, my own children and now my Godchildren
I love cuddly babies, and from 4 upward, it just gets better and better, for me.
You are going to find there is an age that you start hugely enjoying, it might be around 4 or 5, and you will enjoy it all the more because you have put in the ground work to have a fantastic relationship.
Good luck! xx