I take it you had a loose brake line, i take you have tightened it now. Bleeding brakes is simple, best way is to get a one way bleed pipe, if not put some break fluid in a jar, open master cylinder and top up, put spanner over bleed nipple on furthest caliper first then place tube over nipple , pump brake and open bleed nipple pump till you get a steady flow, then do the same to the rest one by one ...keep an eye on fluid level dont let it get to low. If its still a bit spungy then go back to to the first one and this time pull lever and undo nipple at same time, hold lever in and tighten nipplethen release lever ....do this a few times and all will be good...Rick