41 and overweight...yup, gonna Tri in Sept !

after ballooning up to 265lbs  ( 5' 10" ),  ill be taking on the hopfully enjoyable task of getting inshape again,  and completeing my 1st sprint tri  in September ( .6 Mile swim, 15mile bike, 5k run ).  Plan is to work on diet / general fitness starting TODAY,  and with 20 weeks to go,  be in decent enough shape to start a tri-program. Been lurking on these boards for a month or so,  and wanted to introduce myself.  wish me luck.