I'm 28, and did no music at school. Took up trombone at age 20, now play to a good standard in several mid- to high-end amateur orchestras. Took up singing at 23, less seriously, am a competent solo/choral classical singer. I have no aspirations towards earning a living from music, though my SO is a postgrad at music college, so I know a lot of people who do - had I started when they did then it would be a realistic option.I've always said that I would take up piano when the time is right. I think this time is now. I'd like to make sure that this is a good idea, and that my goals are realistic. I am interested in classical, opera, jazz, and show music.Due to my living arrangements, I am unable to practise trombone more than once a week (and that with a practice mute), and I have no immediate urge to work more seriously on my singing. Getting an electric piano with headphones would give me a realistic expectation of practising 3-5 times a week. I'm an experienced enough musician to have a strong idea of what sort of pianist I would like to be.I would very much like to able to do the following on piano (eventually...):- Sight-read accompaniment or pit-orchestra parts sufficiently well to play all the music on sight, if not all the notes.- Play, or play accompaniments to, songs/pieces that I am familiar with, by ear, in any key, on demand. Again, to play all the music if not all the notes.- Sing and play piano together.Things I'd like to do, but not as a priority:- Have sufficient keyboard skills to be able to move into amateur conducting/MDing in, say, 10 years' time. I have stage-directed a number of musicals/operas, and am aware of what it takes to be an MD; this is a role which will suit me very well when I have the remaining necessary skills.- Be able to knock out a few classical solo pieces, but not in performance.- Play in a jazz rhythm section from chord symbols.- Jazz improvisation.Things I'm not interested in, on any time-scale:- Playing very difficult classical solo pieces.- Playing pop music.- Performing solo at any level.I'm well aware that there is a *lot* of work needed to get anywhere near achieving any of this. It's taken me a lot of hard graft, and a lot of soul-searching, to get where I am now musically, and I'm not daunted by the task. One aspect I am keen to emphasise is to avoid my past mistakes. I have spent too much time practising trombone technique, and not enough time practising musicianship (sight-reading, playing by ear, improvisation etc.), and my limited practice time must be spent principally in maintaining technique and muscle strength. I want this to be a primary focus from day one, partly because I would far rather be a pianist with strong musicianship and limited technique than the converse, and partly in the hope that musicianship on piano will transfer onto trombone without much extra practice.This is a long post, and I apologise for that, but it is necessary background for the following questions:- Are the above goals realistic for me?- How many years is this likely to take?- Is this the best time to start?- Can anyone recommend a suitable teacher in Oxfordshire or (at a pinch) London?Thanks!