Firstly - Congratulations on your pregnancy!
It is such a nerve-wracking and exciting time. Soon you will start to feel kicks, which I remember as the most reassuring, wonderful, warm feeling.
As PP have said, it really does depend on your birth experience, the easiness of baby and the support you have from family etc. I would add, to a large extent, it also depends on your expectations.
I had a C-section, a very supportive partner and a baby who woke multiple times a night until about a year old. Took 12 weeks minimum to start to emerge from the thick fog of newborn relentlessness. It was year before I started to get a bit more regular sleep, got a little sense of myself back and could have even contemplated something like an evening class.
I also didn't get that initial rush of instant love. I found my baby quite interesting and 'liked' him but didn't really feel start to feel anything like love until a good few months in (bloody adore him now as a funny and curious 3 year old. He's ace!)
I'm going to keep repeating this. My main advice is to go into it with very low expectations.
Expect to have no sleep, a chaotic house, and no time or headspace whatsoever to yourself, To resent your baby for crying yet again whilst you are just trying to do the absolute minimum like getting food into you, brushing your teeth or putting moisturiser on. Expect loading or emptying the dishwasher and putting a wash on to feel like a major achievement in a day
Don't expect to fall instantly in love with your baby. Many people do but it's not a given and it's ok if you don't. Luckily I knew this may happen so I wasn't perturbed by the lack of love. I knew the love would come little by little and it did.
My good friend nearby happened to have a baby at the same time as me.
We had very similar babies in terms of ease and (lack of) sleep. However I had much lower expectations than her of what new motherhood would be like. She ended up suffering from quite severe postnatal anxiety, which she now recognises was caused by her high expectations of herself and what mothering was going to entail. She thought that if she could just be organised and informed enough then it would be easy and fun. When it often wasn't easy or fun she thought that it was entirely her fault. Because I had much lower expectations of motherhood I was more able, emotionally, to roll with the punches.
Some of the best advice I was given before the birth is that the more you surrender (to the lack of sleep, lack of autonomy etc) the easier it becomes.
I have no idea if that's helpful. As everyone has said - its very individual experience.
Here's hoping you have an easy, sleeping baby who you fall head over heels with instantly and really get to enjoy the newborn bit as many people are lucky enough to do.
If it doesn't quite work out like that, just keep on keeping on and accept/seek help if you need it.
Wishing you and your family all the best 