Before you can enter most Futures tournaments you need to enter national tournaments and get your national ranking up. Before players have ATP points, national rankings are used for preference spots in Futures draws (including qualifying). I wouldn't bother getting a Ipin (needed to play Futures events - details here
) until you have gotten a decent national ranking.
Check out this page
for the F8 Futures event in Great Britain starting at the end of this month. You will see that the first accepted player who doesn't have an ATP ranking has a national ranking of 49. Don't be put out that he is 18th on the alternates list (below the qualifying list) as most of the players on that list will not end up playing the event (see their priority) and therefore he will probably get a spot in qualifying.
To get this national ranking, you will need to enter national events (lower level than Futures). I think details on how to do that are here
and then click on the 'AEGON British Tour Competition Pack 2010.pdf' resource for more information. There are also contacts in that pdf. For Future event contacts see the ITF website, for example here
shows the email address and phone number for the F7 Futures event just past.