Will only sleep with Mum!

You're not likely to set any bad sleep habits at this young age.  Do what you have to do to get by for now with a view to encouraging your baby to sleep in their bassinette by 3mo.  You may find that she'll have some sleeps in her basinette and dead refuse other times, that's ok.  If you're comfortable letting her rest on you then do it, it's a great excuse to have a rest too or you can get a sling/wrap/frontpack so you can go about your day while she sleeps.

Google "the 4th trimester" and you'll get some great insight as to why many babies prefer to sleep on mum.  Basically the gist of it is that human babies are born too early.  Evolution has made our heads to big and pelvic bone too small so that if babies were born when they were ready they would most likely kill their mothers during childbirth   There's a lot of studies and opinions on the topic and it makes a lot of sense plus if you remember that Macy is for all intents and purposes still a helpless little foetus it will make you feel less like you're doing something wrong especially when confronted with unhelpful opinions (my MILs favourite was to say that I was ruining their bones by holding them while they slept it was very hard for her to back up that stupid comment when I pointed out there's nothing wrong with my 3yo who slept on me far more often, nor have I made a "rod for my own back" since she is a dream to put to bed and has been since I trained her at 10mo).

Emz I understand where you're coming from too and hopefully some of the things that worked for me will work for you.  Firstly I highly recommend you watch "the happiest baby on the block", when DS was younger we used his 5 s's (minus the dummy) to calm him down and send him off to sleep.  Once asleep it took 2 decades of the rosary (how ever long that is.... about 5-10 mins I guess) before he was so deep in sleep I could drop him from a great height onto his mattress and he'd remain asleep (not that I did).  His late afternoon nap he was impossible to get down and so I conceded that one and spent the time sitting in a comfy chair cuddling him while M watched tv. 

I started sleep training him when he stopped falling asleep easily using the happiest baby methods (I'd need to go back through my due thread to find out when that was but I think it was about 2 1/2 months old).  With sleep training it's completely up to you what method you choose (no-cry, cc, cio) you need to do what's comfortable for you but the most important things are consistency and confidence.  I'm not too keen on leaving babies to cry but have a cradle which meant I could rock him to calm him down without actually picking him up which I think helped hugely.   For us every bedtime has a set routine - read a story, swaddle, say prayers, sing a song as I put him to bed then turn on some background music (which is particularly useful to drown out household noises particularly the noise of an older sibling) that all takes about 5 mins so I'm not away from DD for long.  He now lies there quietly listening to music until he drifts off to sleep.  We sometimes still have issues with the last sleep of the day so I have a recording of me singing his bedtime song which gets put on repeat for him to listen to while he sleeps in his own cot.

I have heard one person use the trick of putting a watch in the cot/bassinet where baby was sleeping, one with a ticking sound so that baby had the feeling of having the tickinglike the beating of a hear. Maybe worth an idea